I need some help because I am just so lost right now and I don’t have anyone to ask for help. My girlfriend won’t stop talking to her ex.
Well I’ve been with my girlfriend for 3 month (I know it’s not long we started in AUG), we been talking for 2 ½ months prior to us dating (JUN). She been in a few relationships and hasn’t been in one since MAY. All of her relationships were pretty bad; the last one that ended in May was because they were together for 4 months and the guy at the time said he loved her. She ran as fast as she could and didn’t talk to the guy till Jun or July but it’s not him giving me the issues, it is her ex of 6 years.
The ex of 6 year’s (the issue) just came back from overseas (July); he was over there for 3 years. According to her they had a decent relationship and they both mutually ended it. They were going to get married at one point and also they were going to have a baby but she had a miss carriage. I guess they hooked out a few times after they were apart. She says they are just friends; he is part of her life and has been for 6 years. Well recently since Halloween we haven’t been talking as much, less than 50% as normal. She said we talk way too much which I can understand we texted nonstop since Jun. so I gave her the space she asked for. So I was concerned after a while about the decrease and asked what was going on. She said she just has a lot on her mind, I asked what was on her mind and she said just wouldn’t tell me so I had to keep asking till she did. She said
GF: Someone wants to work things out there you go
ME: Let me guess your ex of 6 yeas
GF: Yes
ME: Well what are your thoughts about that

GF: Like I said I don't not want to share.
I have a lot on my mind

They hung out 3 days prior to this for 2 days after she got off work. I brought it up today that I felt it was wrong that if she continued to hangout, I really don’t mind them texting as long as it’s appropriate and only friendly because I respect friendship. She just flipped out on me saying and said “that is the one thing I will not do”. I told her how I felt but yet she still just refuses to do it and also said she will keep doing it, pretty much just a big slap to the face on my feelings and wishes. I just don’t know what to do, cut my losses now and give up on her? Just let her leave me sooner or later for her ex? Accept the fact that she won’t stop and just deal with it? Please help me?

I tired my best to be as detailed as possible

Detailed, but totally confusing at the very end. Is she being 'just friendly' with him or more? She will 'keep doing' what? If the signs are there that she is going to get back together with him, it's time to start planning to move out and to move on. Fighting over it will do no good. Just tell her how it hurts, and move.

Sorry it was confusing. She said she's just friendly with him but I don't know.
She will keep hanging out with him.
I can see some signs I guess but I really don't know?

It isn't easy to know when to put up with friendly exes and when to leave, and it's never a good idea to issue ultimatums about any friends, whether exes or not.
She admits that HE wants to get back with her. At least she seems open and honest, so there's no reason not to trust what she says.
I would tell her that it hurts. Tell her you don't know from day to day whether she is just 'keeping you around' until she decides what to do with him. Tell her that you may have to just leave and will decide soon. That is stating your action, your reaction, rather than making demands on her.
But if you say it, mean it.

Just to be honest wit you she want him back because if everything was OK before he came back in to the picture then she still have feelings for him and they had strong plans together and she might want them back Mii. Best advice is to step off before you really get your feelings hurt I know they hurt now but it's better if you step off before things get to bad and if they had plans on marriage and a bby they not just friends its way more then that don't settle move on *STAY STRONG