I've been good friends with a girl called Sarah who i work with for 2 years now and i'm crazy about her but i don't want these feelings for her. She's had a boyfriend for about a month now and it gets me very down and jealous when i hear her talking about him.
I told her how i felt about her and she was fine with it and said that i was attractive but she couldnt bare the thought of losing me as a friend. Since telling her this it's been abit difficult to talk to her as i normally would.
I keep catching her looking at me though, i don't know if that's a sign that she likes me or what?
I can't concentrate at work at all because i can't stop thinking of her at all, she's exactly what i want and i'm so comfortable around her, I LOVE HER! But i won't interfere at all while she's currently with someone else.

How should i approach the future?

Ask her out. It is that simple. Her current relationship is only a month old, if she likes you and has had any second thoughts about not responding when you told her how you felt then that is the time for her to tell you. If she still says no then you are in for a rough time mate, maybe look for another job as seeing her every day is going to screw with your head and at a time like that, for me anyway, it would be easier to deal with if you were to "do one for a bit".

100% agree with Scottie. You need to know before you end up getting the sack !!
_________________