Take your time. You don't have to get serious about a guy yet. Get to know yourself and what you want out of life first, and then choose someone you love and who supports your goals and dreams. The 19-year-old could be right for you in a few years, but right now he may be using you and taking advantage of you. It's hard to know since I don't know him or you. The younger guy really needs to get his own life straightened out before thinking about starting a family.

When people start families or relationships and they haven't gotten their own developmental needs met yet, they continue the cycles that they may have grown up with into a new generation. When you are 15, dating should be fun and you should have freedom to be friends and get to know what's out there and what life is all about. Before thinking about starting a family, please have a look at this:

http://sfhelp.org/