Let me tell you things...

1) She is not the only girl you will ever think about. So even if you lose her, you will find someone else. But let me warn you about one thing... the harder you try to hold on to the concept of a relationship that won't be, the more you'll screw up the relationship that is there.

2) You will have to think of this situation from 2 point of views... yours and the girls. You have to be selfish, given... but you really need to understand what the girl is thinking. Trust me... this has paid of for me all the time... the one time I did not consider the fact that the girl I like likes me as a friend, I screwed up so big that... rest is the usual story...

Let me give you a piece of advice that you should really take.... don't change your way of life for her... not only will she miss it (if she's not into you), she may even exploit it... or if she's decent, get angry because of it.

Rest is upto you mate!