Complicated? You are 16!!!!. Get your life sorted in this order.
Note, I said man, not boy. Wait a few years before you even start thinking about those boys-who-would-be-men.
See how the relationships of your friends go, not over weeks or months, but over years.
If a friend of yours i still happy with the boyfriend she has after 5 years, then he's a keeper. But I warn you, that every boy seems that way after a few weeks/months, but only MEN stay that way throughout the relationship.