Gym crush

I (47f) have an insane crush on a guy at my gym. We say hi in passing but haven't made conversation. I don't see him talking to anyone. Keeps to himself. I guess I'm slightly attractive and am in great shape. I do notice men checking me out regularly.

I want to know if I should try to make conversation with him or just let it be. I don't mind making a fool of myself if I'd never see him again but I'm not willing to change my gym time and I wouldn't want to make it awkward for either of us.

I should also mention I've been a widow for almost 3 years and that I was with my husband for 26 years. So this is all foreign to me.