Should I express my feelings?

Been friends with a guy for a little over a year. I’ve grown to like him and want to tell him but I’m not sure if it’s a good idea. He dates sometimes. He’s actually going to a wedding in June that he has a date for. He used to mention women around me in the very beginning of our friendship but doesn’t mention them anymore. I actually only know of his date because when we were at the gym someone asked if he was taking someone and he hesitantly said her name.
I don’t think I do well with rejection and am kind of nervous but can’t stop thinking about him.
Should I express my feelings?
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