Most Helpful Guy
"I know for a FACT, that I'm very faithful and committed to do anything in a relationship. Isn't that what guys like and want?"
No, not necessarily.
"A good faithful girl that's going to be dedicated to you and ONLY you?"
Definitely not. Have you not heard of the concept of "clingy" ?
"they always end because of the guy CHEATING."
Yeah. You're under 18. They are too, presumably. At that age, guys are big bags of rampaging hormones. They are not interested in relationships, unless they lead to regular sex. And even then, they aren't interested in monogamy. They are going to cheat.