Well it really hard to answer this question without all the details.
First I suppose it would help if we knew how long they have known each other?
Here are two personal experiences they might or might not help.
Story 1
When I was 24 I met this Italian girl. Anyway it was YM_M4I5S3S_2 lust at first site. I mean when I saw her I said to myself "I'm going to go out with that girl". I asked her out and she said she was not interested
. Nothing happened for a couple of month. As she got to know me she started to drop hints that she might be interested in going out with me. So I asked her out again. This time she said yes. We went out for eight month before she dumped me. We've hated YM_M4I5S3S_3 ever since
.
Story 2
A few month ago I suddenly decided that I liked this Asian girl that I had been friends with for several years. Well I asked her out and she said she just wanted to stay friends. It was actually kind of cool because she though about it for YM_M4I5S3S_4 days before gave me an answer. Since I respect her YM_M4I5S3S_5 I wont be asking her out again.
So you see it really depends on the situation. Abbe over and out
.