Hey, so here is the deal,

I've been in a LDR with a girl for about a month and a half and its been going great. Both of us are building our trust for eachother, and while I am her first actual BF, she has really come to trust me. Obviously I value this trust and I trust her in return but I want to keep it strong. One thing I am worried about is that while we have been apart, I have seen my ex on a few occasions. Most of the time I'll be hanging out with some mutual friends and she'll be there as well so its never really just her and I, but a few times it was just us. Nothing sexual has ever happened, and I have told her numerous times that I am over her (which I truly am). She knows how much I like my new gf, and that things between us are done, so I am not worried about giving her mixed signals. Also, my relationship between my ex and I has been dying. We don't really talk much any more and haven't hung out in a while. I think she really realized that I am committed to my new gf.

What I am actually worried about is how can I let my gf know that I've seen my ex and hung out with her, but we are just friends? I don't want to bring it up and sound insecure or make her worry about us hanging out if she doesn't even care. I have been led to believe that she doesnt care because one night at like 3 in the morning, my gf and I woke up to my ex calling my phone. My gf saw who was calling and just handed me the phone and didn't say anything. I know how much she trusts me, and I want to keep that trust there, so should I even tell her that my ex and I are friends and hang out occasionally? I feel like it would be better to clear things up with her, and make sure she understands what is going on between my ex and I, that way she isn't taken by surprise if I hang out with her or something. And it will (hopefully) build trust between us. Which is key.

Thanks for any advice.

Nothing's happened, you say? Then nothing's happened.

You don't need to bring it up. In fact, the bigger deal you make about it, the less she'll trust that nothing is happening. Don't avoid the subject, but if it comes up, just treat it as no big deal... Because it isn't!