Pretty much the same as you - announcing he obviously fancies various people, I panicked when he was out without me because he would clearly meet someone else. I think my prize moment would have to be getting hysterical when he took his shirt off to show two women his tattoo... yes, the lesbian couple
I have destroyed various friendships he has with women (he is the type of bloke who gets on better with women) by him eventually stopping contact as it wasn't worth the hassle.
He has put up with the accusations, the suspicion etc for years.
Finally in January I accused him again of an affair with a new female friend. It was the last straw. He says that years of me not trusting him has worn down his (already fragile) self esteem, he wasn't prepared to give up his first friend in ages, and he isn't sure if he still loves me as we are both such a mess.
There are other issues too, but that is the main one with us.
He has now moved out and we are seeing each other as friends, and sort of early relationship dates.
When I am stable (and on antidepressants) I completely believe that he has never cheated or even thought about it, but when the demons come I am sure everything he has ever said has been a lie.
I am like it with friends too, I assume that they are talking about me, secretly hate me, if I don't hear from them within the time frame I would normally I decide they now hate me. Again, only in my unstable phases.
One of the key things the book said is Don't say what you are thinking. You manage to go through every day not saying 10000 things you are thinking like "You really shouldn't wear that top", so you can manage NOT to say "You clearly fancy her". Yes, I have messed up a couple of times lately, but I have held in a lot more than I would have in the past.
It was also interesting reading about life from his side. About how there is no way he can win - if he is open then you keep pressing for more information as you assume he is lying, if he lies then you keep questioning to catch him out.