Does this sound like OCD to you?

I feel that i obsess over everything my boyfriend does. Everytime he says something, I read a million other things into it. Everytime he leaves and goes somehwere without me, I think hes doing someting I wouldnt like. It doesnt matter if hes going to the store for bread- and is gone the right amount of time- he is still goin to rendezvous with "HER" and i dont even know who HER is. When he says something- whether in esponse to my questions or just out of the blue or in normal conversation- i think he is lying to me. in fact I am convinved he is. We are broken up right now and I still cant stop doing these things. I try everything I know of to stop doing them but they persist. We've had our problems, but we still love each other. I have been diagnosed with bi-polarism and chronic depression. Thats why i was wondring if maybe- even just some- of this was my mind working overtime and being neruotic?I have been like this since we got together- and we ended uo breaking up after 6 months