Background - I have been friends with L for years. Since high school so 14 years now. We have always been there for each other, and normally inseparable until she met M 8 months ago.
First time meeting him, there was something I wasn't keen on, but L seemed happy. But as time went on he began treating her like shit cheating on her, disappearing for days on end on drug binges using her bank card, controlling etc.
I always found him quite a creep round me, making smutty comments and being flirty.
For some reason she always takes him back, I seem to be the only friend who has stuck by her, not through his lack of trying though.
Fast forward to now, I was round at L and he was there. L had popped shop, As I was exiting the bathroom upstairs he's tried too kiss me, I've shoved him away and headed towards the stairs where he's slapped my arse.
I've asked him what the fuck he's playing it. A massive argument ensued and in not so many words he told me L would never believe me over him, so we could start something and L would never find out and he knows I've wanted him for a long time.
Deep down I know he's right. She probably would believe me, but stick by his side. Apart of me is torn because she knows what he is like and has stuck by his side. She has cut a lot of friends and family out because of him. I honestly believe she would cut me out. But I honestly don't believe I can go round there with him living there.
She already knows something's wrong because she's text why did I leave so suddenly and is everything ok. I've had to calm my DH down from going round and confronting him.
AIBU in thinking ending the friendship is the easiest option?