Search Results: guys ask for your number and then not use it

I met this guy the other day, who is the brother of a friend of mine. We chatted together for about half an hour, then he asked if I would like to hang out with him sometimes on the weekends, like go to the movies and such. I hesitated and then he said, "only if you're comfortable with that - I mean, we could go with a few of your friends too."
So I said, "oh yeah, that could be nice."
Then he said, "Cool - can I get your number then?"
So we swapped mobile numbers. 2 days later, he texted me asking if I was free the next weekend (8 days in advance) to hang out with him. I said how I would be busy with seeing other friends and going to church. He then asked what church I go to and I told him that I go to a Pentecostal church, and he said that he goes to a Mormon church, and asked if he could come to my church with me. Like... Pentecostal and Mormon churches are SO different...
So anyway, I've only just recently started wearing make-up and feminine clothes, so I'm not used to guys showing interest in me... So I'm not even sure how to tell when a guy is showing interest or when he just wants to be friends.
I've had a couple other guys ask me out since I started wearing make-up, but it was more clear to me in those situations that those guys were interested.

Recentlay a GaG'er asked a question about how long girls waited before having sex. Girls received a lot of unhappy down votes for choosing to wait. Guys don't realize we don't wait to play games, we wait to be sure you are on the path to genuinely liking us. We know that having sex won't make you fall for us and we like to be more secure. If we are waiting it is because sex is important to us personally.

I know the following is true: Guys don't have sex to fall in love, they fall in love to have sex. If a guy is only interested in sex, nothing will change that. But how about the opposite? What if you were thinking of a potential longer term thing?

If you met a girl for the first date and ended up sleeping with her, would that color your opinions of her? Like, "wow, she is easy. I'll keep her for sex but not thinking of anything more now." Or does it truly not matter?

If it DOES matter, how long/what is the time frame you look for before having sex with a girl you are considering for a LTR is acceptable?

Today's world, so many girls find themselves throwing it away so easily, then being heartbroken when the guy treats them like a friends with benefits with no interest in anything more. Some even claim to be immune and only in it for the sex, but most are truly shattered and feel used. Is there a correlation?

Truth, honest truth. I know a lot of you guys are younger and just have sex on the brain, but think about this question seriously for a minute:

If a girl sleeps with you too soon, does it change your opinion of her and what you expect from her?

Bonus question: what is the "magic" number of dates you will go on before you expect sex from someone (I know each situation is different, but roughly) you are considering for a LTR?