I need relationship advice please read?

my boyfriend and i have been living together for about a year, our relationship is rocky. lately we have been fighting alot. i have had 2 miscarriages in 6 months. a couple of months ago i caught him talking to one of his stripper friends who he use to talk to alot befor we got together.. then i caught him going up to wear she works.just the one time he said. i forgave him for it. then lately hes been on myspace alot and emailing. well i got this idea to creat a an account using a diffrent name and photo. i emailed him he emailed back of course... after a couple ofemail i asked about a girlfriend and he replied back yes i have a girlfiend or a roommate... What does this mean... does he really think of me that way? and what do i do when he wants tomeet her or (me) i should say... i really do love him.. i have never screwed around on him never even thaught about it till now