stuck in a closet and trying to get relationships

So I'm gonna assume you mean a relationhip with a girl.

In which case, yes, coming out would definitely increase your chances of finding someone to be in a relationship with. The problem of being closeted is.. you're closeted. If you don't tell people you're gay, there's no way for them to know you are. So how could anyone ever consider you as relationship material when for all they know you're straight? If they don't know, and you don't tell them.. that's a dead end.

Now if by some chance you do find someone who does take a real interest in you despite not knowing you're gay, and at some point you decide to tell her "yes, I like you that way too," then there's still the problem of you being in the closet for the rest of the world; I'm sure a lot of girls would have a problem with that. Most people in relationships want the world to know they're in relationships.

So yes, coming out would 1. increase your chances of finding a girlfriend, and 2. increase your chances of making the relationship work.

 

If you don't want to come out to everyone, maybe you can seek out gay-friendly social groups and be out only to them?

 

If you came out, it would definitely increase your chances of finding love, but there are still ways of finding love while you're in the closet, join an LGBT group around your local area, that should help you meet people and possibly a love interest