Is this omen good or bed? It involves a different number of crows.?

All this week in my high school PE cl we had been going to the pool. I sat on the cement in the shade and every day, on the fence at the top of the hill behind the football stadium and beside the pool, was a crow. First there was one and I felt very calm by looking at it's proud posture. The day after there were two. Then three and yesterday there were two. What could this mean? I've also been going through a terrible time as my friend decided not to be friends with me (she actually "dumped" me the same day that the crows started to appear). Are these crows a good omen or bad?