How do I trust my girlfriend
Here's the story
When I got with my girlfriend she was not long out of an abusive relationship. Her ex had just been given 3 months for physically abusing her. When we were only a few weeks together she found out she was pregnant for her ex. Having heard her story I decided to stand by her and take the child as my own. A hugely risky decision as I can see now, but 1 that I'm happy I made all the same. When the ex got out of jail the texts and fone calls started. So I got her a new fone and no, which gave us peace and comfort till he got the new no when it all started again. I tried to turn a blind eye to it but it was so hard, then I found out she had text him back. She said it was to tell him to piss off. Now I will admit I have trust issues, but I made it clear to her that if he text again that I wanted to know, but no I caught her a few times with his no in the message log but every time she claims that she is telling him to go. She says that she hates seeing me get thick over it and that is why she hides it from me, which I can understand.
However I caught her talking to him one night when we were out. She left the club purpously to talk to him. This is what has me driven around the bend, she feels like she has no power to turn away from him when she has been drinking, she says that she cannot explain it and she doesn't want anything to do with him. But still when he turns on the charm she forgets everything he did to her
What am I supposed to do. I left her for a few days after that and she claims that it will never happen again as he admitted to being a dirty junkie, but its so hard to trust her. Every time she gets a message on her fone, I don't want my mind to go into overdrive. I have no comfort when I go out either, wondering if when she is gone is she with him, or even someone else
Please help me to figure out what I should do