What should I do?

[Simply_Lea]

I started work the other day and I met this guy who works with me. He's really amazing and sweet. When I'd finished work I started walking home and he left work early and came to find me so he could give me a lift home. He also helps me out a lot in the kitchen (we work in a pub kitchen), because I've only just started. I haven't asked him to help me, I didn't ask for the lift, but he did it anyway.
I really like him, but he already has a girlfriend. I was really jelous when I found out because he is just amazing. She is really lucky to be with him and I really wouldn't want them to break up because of me or anything, but I am finding it so hard. I like him so much.
I don't know what to do.
Help?

[beryl100able]

Keep your contacts with him very non-commital and detached, without being unfriendly, and let him know you are aware of his girlfriend. If he does ANYTHING that you wouldn't like your own boyfriend to do, tell him you don't want to do that (e.g. accept a lift) out of respect for his girlfriend. That gives him the clear message that if he DOES decide to leave his girlfriend for you, which no one knows, he will be perfectly well aware that you don't tolerate unfaithfulness. He may as well know that from the start, or you could end up having to tolerate HIS.