What do you think? I'm confused...

I always sense that he would stare at me often. This is because when he is not around, I don't have this feeling with his friends, and they never act so odd. It looks like he likes and wants my attention.
There was one time, he served on the left side, but then suddenly switched to my side and was so happy. This is rare because it seemed that he was assigned to serve the Bishop.
Sometimes, he stood in front of all of his friends as if he could see me from afar. Recently, he was kind of mad when he did not serve on my side before he was gone for 2 weeks.
When Mass was in the bigger room, he could hurry to the spot, where it was convenient for him to look at my direction.
Once, when I was looking at his direction after Mass, at the moment he was about to walk down, he almost hit the flower vase. When he walked down, he pretty much looked down at the ground and hid away. His behaviors were so obvious that although I want to ignore like nothing happened, it was hard either I could sense it or saw it.

We rarely have a chance to talk to each other in person, but he won't add me again on FB although we had a weird situation back then and he blocked me later. Yet, at church, he would change from smiling to himself to a grumpy face and it looks like it is depended on whether I would give him attention or not.

Some said there were no signals that likes me because he has not asked me out, but some said he does and just shy. Church is a place where we all should respect and focus in Mass, but he acted so odd, especially when he's serving for the Bishop; he should not act this way.