<human>: Can you condense the text into a few key points?

I'll try and keep this as brief as possible.

Around six months ago I **[M 22]** ended a four year relationship, with whom was my first ever girlfriend **[F 20]**. By nature I'm very slow moving with regards to intimacy towards strangers, and still feel incredibly novice in this field.

I recently met a a girl **[F 18]** over Facebook who I chatted with for several weeks. There was an obvious connection between the two of us here, if nothing more than intense flirting.

She invited me over for drinks just the other night, it was blatantly obvious it was leading towards sex. We had a few good conversations, along with a couple of drinks, followed by a little intimacy. I could tell the girl was definitely in the mood.

I made the mistake of mixing some prescription pain killers with my drinks, and was some what faded through out the later end of the night. This didn't aid me what so ever.

After seeing hundreds of green lights, I decided to go for sex, but did a very poor job. From everything to initiation, to foreplay. It was almost as if I had forgotten how after being in a loveless relationship for so long. It ended up going no further than some touching and a little kissing.

Eventually we became tired so I decided just to call it a night and left. It was definitely one of the most uncomfortable moments of my life.

I have only heard from the girl briefly since, and while I've recognized where I went wrong, I want your opinions on whether or not I should brush it off and try for a second date with this girl and take things slower, or if I should just cut my losses, learn from it and move on.

Also note, I'm not just out to get laid here, I'm genuinely torn over how to approach these kinds of situations as I feel like a complete newbie again.
<bot>: Met girl. Girl was keen for sex. Didn't initiate sex properly. Awkwardness ensues and I'm not sure how to approach it or if I should move on.