I am suddenly really attracted to my girlfriends friend/roommate

I have been so weirdly attracted to my gfs friend/roommate she's not even my type she's a punky emo tattoos piercing kinda style but she has nice boobs. We've never really got along she never really likes when I'm around and will never hang with me and my gf. I kind of think she's weirdly attracted to me too.

My gf works nights so me and her friend are there alone a lot she spends most of the time in her room. The other night she 100% knew I was in the living room she cut across the hall to the bathroom in a small tight little pair of underwear they looked like she's had them since middle school and holding a bunched up shirt across her boobs I couldn't believe it it was so hot she slammed the door and got in the shower

my chest was pumping I was so horny I quickly jerked off hoping It would go away before she got out NOPE. That was all I could think about couldn't even focus on a show or anything she was getting ready to go run out for a few the second she left I found those underwear and jerked off oddly enough the way the apartment is set up they share a big closet that is in the middle of both of their rooms and she always throws her dirty laundry on the floor in there.

So basically that has made it 10x worse It was so hot her underwear smelled amazing it was such a rush but I instantly felt regret but can't help but get so horny when I think about it I've had 3 other times since then that I've had the house to myself and everytime i go straight to the closet. I may just be over thinking it but it seems like she knows every day her dirty underwear or dirty bra and underwear are placed right on top of her laundry. Idk what to do I feel so bad but I can't help but think about it everytime I'm there alone will this go away with time or what??