Relationship advice - need some kind help please?

It being your first relationship you sound young. It won't be the end of the world whichever way you go. However, girls change over time as to what they are attracted to. It doesn't happen in a matter of months though. You're probably not going to marry either one of these guys, right? If the dude you are physically attracted to is young, it USUALLY means he knows he can get girls. Young girls usually have all of the same criteria for guys. Women don't. Keep your options open. Dating is dating; not monogamy necessarily. You're young; let it ride and go with what you want. If you're having doubts about this one you are with....then I think you just answered your question. You might or might not regret splitting up/or staying with this one. B/c you're new at this; I'd split gently with this dude, get with the other one and see what you like more. Relationships are as much about practicing and you as they are the person you're with. You have to figure out what you want and what you are TRULY attracted to. Its a learning process that EVERYONE goes through. And it sucks royally. Good Luck. Hope I helped.