I’m looking for some advice. I recently found out that my boyfriend hung out with his ex a few months ago, and this particular ex has caused a lot of drama in our relationship already and at the time we had been dating for about 3 months and had a few times where we were on and off. He said they didn’t hook up, but he never told me about it until she posted a picture of herself at his house wearing a hat that I had bought him. I feel like it’s hard to trust him now and I’m a very emotional person and keep talking to him about it and I can tell it’s frustrating him that I’m bringing it up a lot and kind of asking the same questions. I don’t know. He has no feelings for her, he says he loves me but I’m just so stuck about how to get past this and begin to trust him again. I’m just so hurt. Any advice I’d appreciated.
If it's causing drama and still hanging around with his ex. Then it's time to cut off the relationship. Sorry but the one thats getting hurt is you.
Yeah hanging out with ex’s is a no no in my book.
He never told you, which is red flag #1. He let her wear the hat, #2 He's hanging out with his ex, which is a NO in my book. You are asking for serious trouble if you stay in this relationship. A quality man knows not to do these things.
To me, that is just so disrespectful. You have every right to be concerned and hurt. Hopefully, he at least recognizes that and isn't trying to minimize it and make you feel bad for being hurt! It's never that easy to just be like, oh yeah, I'm done, see ya. But, you are worth more, you deserve respect and you deserve to have your feelings validated. Good luck, hope it turns out OK for you 
Ex’s are called ex’s for a reason. As in “past tense”. There are zero reasons that they should be hanging out at his place and wearing his stuff. Red flags are there!! But ultimately it’s your decision. Personally I’d drop him like a bad habit. But that’s me.
You busted his a$s big time! It’s his ex and his drama. You know what to do. Yeah it’s going to hurt, but you deserve better. All this drama that you’ve put up with, and now you bust him like this 
. Be strong
The only time that I would communicate with an ex is if there are still feelings there. Focus on yourself. He sounds like drama.
End it. I’m sorry 
Drop back 10 yards and punt