My boyfriend and I have been together for 10 months and my boyfriend doesn't call me I have to call him first and then he will text me then won't text me for like 4 days I have comfronted him but all he says is "sorry he will change" and it makes me furious

I didn't care about them talking but then she told me she liked my boyfriend and if I wanted to switch boyfriends
She really peed me off when she said that so I told my boyfriend that I don't feel comfortable with him talking to her since she like him and stuff. He just laughed when I said that and he said he would stop but then he was talking to her and he didn't text me or call me he quit texting me and was talking to her so I was wondering should I be upset about this situations.:)
HELP!

Not sure but sounds like you need to trade him off. I have no idea first if he really is your boyfriend, he does not really sound like one.

Next if he is, does he know he is, since he is not acting like it.

Why you have not dumped him is beyond me

Hes playing you like a fool. Finish things with him and never put 100% of yourself into a relationship if they are not. Its called push / pull. If they pull away you do the same. If you push and they pull its going to go down hill..

Dump him and find someone who cares and respects you.

No contact and no game playing with this one.

I agree with what's said, also I'm sorry, but he is just not that into you if he is acting like that. Don't try to validate yourself to his actions of ignoring you by giving up more of your time to try to stay connected with him. If someone repeatedly broke your trust with half truths and lies why bother sticking around?

Sometimes when you're heavily invested and the other person is not it's a good idea to end it just for simplicity sake and saving yourself from some heartbreak. Go have some great experiences with someone who actually wants to spend time with you. No point to be hung up on something like this.