I'm the worst person ever. but I dont even feel bad

I don't normally do this but im in a really bad situation. Last year 2 of my best friends broke up, they had been together for a long time and im still really good friends with them both ( lets call them guy 1 and girl 1) anyway guy 1 went a bit crazy when he got dumped. Got with a weird girl for a few days and was clearly tryin to get her attention because he wasn't over her. Which is understandable. Anyway when they broke up I became a lot closer to girl 1. I invited her to a night out at uni. And we ended up in my room and had sex. We felt awkward about it but were still as close and everything. We didn't tell guy 1 who doesn't know. (This was about 6 months ago). Moving on about 4 months ago I was in our unis su bar. A girl (girl 2) had been getting close to our group of friends and one guy in particular (guy 2). So one night he was out and I was in the bar with girl 2. We kissed and almost went back to my place. But got stopped by guy 2 (luckily he doesn't know what we were doing). They were practically together (but not officially) and me n her grew apart a bit. Im still not sure if he knows what we were doing. Skip forward to just over a week ago. (Back at home girl 1 lives near me). She was drunk one night rang me up and ended up at hers and did it again. Skip foward to the other night we moved into our house (I shud mention guy 1 is living with me this year). And also girl 2 moved into her house down the road. I shud mention girl 2 says she hasn't been seeing guy 2. For a month or so but she still has feelings for him. Anyway on the night out guy 1 actually wingmaned me to help me pull girl 2. We went back hers, she slept here last night as well and we've had sex 3 times. I don't feel any were near as bad as i shud I do have feelings for both girls (one of them more than the other) neither of them want a relationship as they've both just got out of a long one. So advice?

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