Ok, so quick back story.....
I was with my ex (dd's dad) for nearly 10 years. Over a year a go, I was struggling with my sexuality, realised I was bi sexual and I met a woman who I fell in love with. Me and my ex broke up before we got physical, as I'm not the type to cheat. We would have broken up anyway, as we're just not right for one another and actually, looking back, he was very aggressive, moody and some might say, an emotional abuser. Actually, towards the end, it was physical a couple of times. He didn't hit me, but he man handled me a lot and at one point, had me up against the wall. So basically, not the nicest guy in the world.
I've been with my gf for nearly a year and we're very much in love, committed and very serious about one another. My ex knows this. Obviously I have to keep things amicable for the sake of dd, who is 6. We live close and so he sees her a lot. 3 or 4 times a week actually, but usually just for an hour or so after he's finished work. He's in a new relationship, but I know he's only using her. I am glad he's found somebody because he was desperately unhappy in the beginning when we first broke up. However, like I said, he's just using her and I can't see it lasting.
I know he wants me back and in the beginning, he used to try and kiss me and would cuddle me, just that little bit too long. Made me feel very uncomfortable and even though I hadn't done anything wrong, I almost felt guilty. Does that make sense?...
Anyway, that kind of stopped for a few months, but recently, whenever my gf isn't here, he'll come on to me and I've been getting really angry with him. Today was the worst. I was looking under the stairs for dd's book bag for school and he just pinched my ass! I told him to stop doing that and he laughed and told me that I love it really and he just can't help himself. He even kept doing it after that! He always says really inappropriate things to me about missing cock etc and like I said before, it makes me feel guilty. Like I'm hiding something, which I am. I told her once, when he tried to kiss me, but that was because I was so upset about it and I really couldn't keep it to myself, but the other times have been less obvious, but it's pretty constant now. I've told him to stop it, but he just seems to find it funny.
My dd actually heard me tell him to get off me today and I have a feeling she'll be saying something to gf as they're very close now.
So, should I tell her? I don't want to upset her 'unnecessarily'. I would never cheat on her. I couldn't, but I know how I'd feel if it were the other way around. So if I know I'm never going to do anything, is it worth hurting her? It just feels so wrong keeping it from her, like it's a secret between me and him and I think that's what he's trying to do.
Advice really appreciated.
Thanks