Should I let go or not?

So I have this guy (I'm not so sure if we're still together), he is 18 and I'm 21. However, that doesn't bother. We had an argument about a girl that I feel uncomfortable with. She says I miss you and I love you. Yes, she has a boyfriend. But how she talks with my boyfriend is just really so uncomfortable. My boyfriend finds it wrong at some point. I am not a jealous type. I just really feel uncomfortable about it. And now he stopped talking to me. Saying he is tired.

Since how many months/years have you guys been together? And did you talk to him about it like, one-to-one? Like have you given it all to make him understand what you are feeling? Sometimes it is lack of proper communication that leads to unnecessary breakups. On top of all.. Did you just say that he stopped talking to you over this matter? That is insane. And i would also like to tell you that it is okay to be jealous. Well, i hope you know the limits. You have to be jealous sometimes and it is your partner's job to solve that for you. Insecurities arise in relationships, but those have to be done away with. It should never be you and him against each other it should be you and him against the problem. And darling, if he isn't ready to do that, i think even you should think about where your relationship going because problems are inevitable and so should be your love in spite of the problems. :-D