Should you only date a girl if you can see it going long term?

I need to vent. My whole body feel tightened and tense from anxiety. I've only slept with 2 girls and one of them was a long term girlfriend. I had to leave her because she wanted me to be a stepdad to her child. I vowed never to date another single mother. All the above was until Saturday... Last Saturday, I went out with my friend, J, and his new gf, L and L's friend: D. It was the 2nd time I'd seen D and L. I kinda like D but I'm nowhere near the attractiveness of the guys that she can get. All four of us met in a pub. I would like to date D, as she is my type (she's exotic, curvy and has no children). The first time I saw D, she said that she only likes light/white guys. This time, she said that her parents only allow her to date white guys. I'm not white. When J and I went to the bar to get more drinks, we stumbled on two girls, S and R. So anyway, R and I get talking. D had to leave as she prearranged to go to a club with other friends. L and J tell me that they're sure that D likes me (she called me eye candy apparently), but I don't think she likes me enough to date me. She's newly single and I guess she is just being nice. R and I end up going back to my place. And got intimate. It wasn't the best by a long shot. I seem to be crap at same night lays (this was my 2nd ever) and give a better performance in a relationship. I didn't use a condom. I had them to hand but was drunk and an idiot and didn't put it on. I went pee (so, little to no sperm in urethra) before the sex and I didn't finish. I hope this is enough to dodge the fatherhood bullet. This girl is nice enough, but isn't my type, and she has a child. I feel so depressed due to the combination of what happened: - crap sex (I didn't represent and I wasted an opportunity. I don't get these often, as I'm not an attractive guy) - no protection (I have left myself open to being on her terms now should the worst happen. I'd almost rather have an STD than a kid) - Desperation (I think desperation could lead me to seeing if this could form into something? Is it wrong to SEE if you want a relationship with a girl by spending time with her? Even if you know at some point, her child will become an issue? Is this gonna lead to more hurt later on?) On a scale of 1-10, how big of a bastard am I? I feel like sh*t if it helps. I also feel confused and don't know what to do.

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