My friend is 18 in college and she met this guy 3 weeks ago that graduated college and has his career job already.

The guy only talks/texts her on weekends (Friday,Saturday,Sunday) and that's when they go to his house, watch movies, fall asleep together and I think they had sex the 2nd week they were at his house.
She met his family and he met her family.

She talks about how great of a person this guy is and how he cooks her food, massages her feet, etc and that both of them talked about moving in together around summertime and talked about getting married later on.

I'd like to know if this guy is actually looking for a relationship or if he's just doing those things for sex on the weekends.

As both parties are ADULTS what they do with their time is their affair.
What does it have to do with you ?

She's my best friend and I don't want her to get hurt again.
Her ex said he cheated on her after 3 years of the relationship and then she met this guy the week after. And it's been going on since.

I don't want her to get cheated on again.

She is a big girl. Love and support, but you can't protect her from life.

Unfortunately for you (and others who have been and will be in this situation) there is nothing you can do about this. Even if you KNEW he was no good for her, telling her could backfire on you. The only right answer to this is pretty much what everyone else said...let her live her life and make her own mistakes. Butting in, trying to make her see things your way will not help anyone.

Well last week, she called me and bragged to me about the guy she's talking too and all the things he does for her. She even talked about how they kissed, slept together, etc. IDK how she was able to just jump into something else with him after 3 years of me and her
But after she told me those things, she's been calling me at night to talk, sleep on the phone, and we even text throughout the day.

What would the reason for bringing things like this up and bragging about him towards me be?

LOL, most likely they are having sex every weekend they are at his place, that is often what young adults do.

Only he knows what he wants or have plans for. If he is not talking to her during the week, perhaps she asked him not to . If he is not, she can ask him why.

Perhaps she is only using him for sex. She makes the choice to go to his place

So you aren't just her friend, you are her ex. Are you the one who cheated? If so, then it sounds like she is 'getting back' at you.

You aren't going to like this but you need to stop all communications with her. She is not your 'best friend' at this time. She is tormenting you. Stop it now.

Get on with your life and leave her to live hers.

LOL...well now, this changes things just a bit. Now YOU are the ex? You couldn't bother to tell us that before, could you...why not?
So you cheated on her...but now this becomes more of a jealousy thing and not just from a friends perspective where you are looking out for her. Now you are jealous about this and that's where your question comes in.

But again, this information changes things. She is telling you this stuff to get back at you for cheating on her.

Lmfao. OK you guys caught me, yeah I'm her ex and we're friends now.
I just don't want her to get hurt again.

I didn't say it was me because it's embarrassing. Also, I didn't cheat on her. I only said I did to see her reaction. I felt like we were distancing from each other and we were already so far apart physically so I said I cheated on her to maybe get her to show me she still wanted me because that's what I'd do if she said that to me. I'd try to get her back.

So sorry for the missing information. But now I don't know what to do.
She vented to me last night and I acted like I didn't care and she got mad and said she'd stop talking to me for good now. 10mins later.. she calls and ask to sleep on the phone.

It's a really confusing situation for me and I still do have hopes of getting back together that's why I haven't cut off communications with her. I feel like she likes talking to that guy because they can physically be with each other but she's still attached to me because of how much we loved each other throughout our relationship.

You aren't emotionally ready to be a friend with your ex, but just want to keep the door open in hopes she changes her mind and crawls back to you. Even worse, you can undermine her relationships with the excuse of looking out for her. Maybe you haven't done it yet, but you will, and all the while torturing yourself keeping all the old feelings and unresolved issues, like the distance between you, stirred up and in the front of your mind.

She uses you for an emotional tampon, and you squirm in misery and confusion. A quite unhealthy friendship for you both.

Playing childish games in a relationship will get you nowhere. Never, EVER say you did something that you didn't do, or deny something that you did do. Honesty is always the best policy. Especially in relationships.

Most people would drop a cheater in a heartbeat. Not try to get them back. I don't want sloppy seconds, do you?

Sleep on the phone? I guessed I missed your ages. Are you in your teens? 15 or 16?

Look y'all broke up. End of conversation. You lied to her, she got pi&&ed, as she should. It's time to go no contact. Stop contacting her, delete her info from your phone and social media. No contact whatsoever. Get busy with your life and let her get busy with hers.

Take this as a learning experience. Never lie to your partner to get a reaction.

What you might have had is ancient history... its her life and her choices now... like it or not... there is nothing you can do. And it really does reak of jealousy.

If you knew what was best for her... you wouldn't be broken up... she's no longer yours... and if you try to sabatoge this... you WILL look like the spiteful and jealous ex...which apparently you are based on this thread.

And really... if she was so in love with you... and Soooooo attached to you... then why is she dating someone else. Time for a reality check.

Find a new girlfriend....and leave this one alone....time to let go and stop hoping for what never was and what isn't going to happen. This can easily turn into stalking...