Is this wrong?

[oddfish]

My girlfriend and I broke up a week ago and tonight, i'm walking back to my dorm with my Laundry and this unnecessarily hot girl is locked out of her dorm, right? So, i just smile at her as i walk by and she feels really emberassed and she just kinda laughs as i go by. So, i stop. cuz, how do you not. And i asked her: "um, i imagine being locked out of your dorm in your underwear wasn't the plan, right?"
The answer was a big negative and she asked if i had a phone she could use. i did. it was at my room. so i asked her if she wanted me to run and get it and she asked if she could just come back to my room and use it cuz it was really cold. so i said yeah... of course.. she comes back to my room, uses the phone, and then we start talking, while she sits on my roommate's bed in her underwear. talking led to flirting, flirting led to minor physical contact, that led to playful jostling, which in turn led to naughtiness of a nature i wish not to describe in the forums.

i almost didn't catch this girl's name.

i feel really shitty right now because i'm not sure if this was a good thing to do at all.
this forum community has been really cool to me since i've been here and i figured you guys would be able to tell me in a rather mature fashion if i should feel like a prick or just relax and not worry about it.