first mistake, never "ask them out"
get to know them and such, and then eventually just kiss her at a perfect time, then after many blissful days of that, ask her if she is ur girlfriend
the big mistake guys make is not being very close to a girl and then out of no where asking her out like "will you go out with me" thing
the foundation is bad first of, since u hardly know her, and when the love/liking is gone, u are left with nothing but bad memorys