It usually means they are captivated by them, and it makes them feel really good. That there is a warmth in your eyes they are drawn too. Why can you not make eye contact with him very long? If you really like him, just let the natural you shine through, he will appreciate it, and want to hang around with you. Good Luck
If he's got a fob watch on a swinging chain, he's trying to hypnotize you..