So many factors to consider:
1) How old is he? - If he's in high school then it's going to take time for him to work up the courage to come out. Coming out is a personal journey and as we get older we develop the right tools to come out.
2) How does he feel about being gay? Is he ashamed of it? Or is he okay with being gay, but doesn't know how to come out? If it's the former you need to run!
3) How deep in the closet are we talking here?? If he's in too deep you should leave!
I wouldn't date a closeted man at this point in my life, but I don't know where he or you are in yours! Best of luck
