Like pestilent said:
You've got balls to post this on a video game forum.
With that said, I'm going to go with it and hopefully give you some advice.
- Either turn Girl B into a "DO NOT FUCK" friend or dump her. Either way its bad news to keep going out with her in sexual/romantic way. Lay down new limits, and just be her friend. If she can't handle that, well tough shit for her: then be glad you don't have to deal with her.
MOST IMPORTANT
- Regardless of who you end up pursuing, do not, I repeat DO NOT conduct sexual activity with anybody until you finish your chlaymidia treatment. I used to teach HS Sex Ed for Planned Parenthood. I nearly had a heart attack when I read what happened. Dude, be glad -no, that's too light- THANK YOUR MAKER that you didn't catch anything worse! If you ever think you might go somewhere with a girl (I don't care if it is the 3rd day or whatever) -if you'd ever consider having sex -bring protection. Girls get horny out of their minds too, and when they do they are just as likely to "conveniently" forget about an STD as a stupid guy is. Anyway, just consider it a bad, but not awful lesson. Moving on:
- With Girl A: if she's nice, pursue her. If her boyfriend can't commit, well tough on him.
- As for the car incident with Girl A: I'll bet you she said "wait" because she wants to take it slow. Listen to me: take her out on dates, treat her well, at most hold her hand: DON'T TRY AND EAT/FUCK/WHATEVER HER! Just be cool, be nice. I'll bet you money that she knows enough about you and Girl B that she doesn't want to be like that slut, or treated in that way. Be patient with her (especially since you don't want to infect her). Let her build up the desire to jump you. You'll earn her respect and get a better relationship out of it. Of course, if she doesn't make a move for a while, you may want to ask.
- the bottom line is you're kinda in a bad reputation situation, but you're not irredeemable. Be careful. Dump B, heal yourself, no sex with anyone til you heal, and go after A with a lot more patience (and respect, since B showed none towards you -you were had).
I hope you read this, and I hope you take the advice.
Good luck,
Bobak