How can i learn to trust people before i push them away?

I have bad trust issues, I need advice on easy ways to lean to trust people and my boyfriend, cause I am affraid I am pushing him away because of lack of trust. I tell him constanlty not to smoke weed, and not to talk to other girl's, or hang out with...

girls, unless he is with me. I have no friend's cause I dont trust anyone except some of my family members.

The best thing to do is talk about your trust issues with someone you trust (ex.: a family member, a therapist). They can help you understand why you are lacking trust. Trust has a lot to do with self confidence. Maybe you lack confidence in yourself and therefore others. These are all issues you should read up on and talk about with others. The important thing is to be honest with yourself and your boyfriend. Tell him you have this problem and that you are are working towards making better but that you also need his help. You can't demand irrational things like not to talk to another girl but you can ask him to avoid putting you in unpleasant situations like talking to other girls in front of you.