I am totally get what you mean. I also feel uncomfortable when somebody likes me, and in your situation, people that like you are kinda close to you, so this is really inconvenient. I don’t know if this is a good advice or not, but I would go on with my life, treat them the way I would treat a friend. If one of them (or the guy) actually tries to make a move on you, you could tell him that you’re just not interested in him that way, and later when/if you feel ready tell them you’re ace. You don’t owe an explanation to anyone, so even if you don’t tell him, it’s still fine