So...Any ideas on what to do?

I used to love being bi. Yeah, the best of both worlds, seems good to me, and i always felt confident about everything, not just sexuality. A month or so ago, me and my boyfriend broke off our relationship which i was devasted about but we're still close friends. A few days ago i got back to together with my ex (and friend) from a few years ago. (Who's not bi, but 100 percent lesbian) yes, i know it's been one month, but he's fine with it, and i feel happy with her. she can make me feel uncomfortable somtimes, when she thinks wwwaaayyy too far into the future, and when she gets our friends involve i cringe. But on the whole shes a fun, friendly person to be with.
Although i'm openly bi with most of my friends i'm not exactly "Out of the closet" no one but----me, her and a few close friends, and a few family members know, so coming out to the whole of the world to me is like signing a trip to death-row.
Plus, to make it worst, i'm not too sure i always feel comfortable with her because- she's so---forward. She's trying to plan loads of freaky plans for the future when honestly i just want to enjoy myself and think about the present. yes, i like her, but i wouldn't say i'm in love with her. i just want to enjoy myself and have a nice, happy relationship and she keeps saying if we're still together in 3 months i'm going to have to come out. HAVE TO COME OUT. as in, not on the internet, TO THE REAL WORLD. i paniced and thought "There's no way i'm ever doing that, i have to dump her!" But i couldn't bring myself to do It. firstly, after my 9 month relationship with my boyfriend Johnny, and then just a month later her, i would already look like a slut, without dumping her after a few weeks either. secondly, i'm totally worried about her reaction. last time we broke up, sparks flew. i really don't want to upset her again, and have a huge drama.....But i don't want to come out either....EVER. and she insists i should. and if i don't, i bet she's going to be p*ssed as hel