How to interpret mixed signals...(Update on my situation of the guy I like)

Ok-no I haven’t shown any courage and talked to him yet…and I don’t know how to interpret tonight. So I sat out in the lobby and studied the whole time. He walked by once, running out to his car I guess, but didn’t say anything to me. I don’t know if he knew I saw him or not. I may have looked like I was deep in concentration and he didn’t want to disturb me, or maybe he didn’t want to say hi…:(

He leaves. I know he saw me because I was sitting right at the end of the hallway, still studying mind you. He took a while before he actually left, and I wondered at that. Even after he left out, I continued to work for about 10 minutes, then ran in the bathroom before going out to my car. I figure by now he’s long gone. When I walk across the parking lot, his car is sitting there running/warming up. I walk to my car and he finally drives by on his way off campus.

What I can’t figure out is if he’s avoiding me. He doesn’t speak to me, but I thought he’d be long gone by the time I left and he was still in his car in the parking lot. I mean, no-one needs that long to warm up their car, right?

Someone tell me what you think…if he is avoiding me, than I’m worried about trying to talk to him, how he’ll react, etc…