well i think it really depends... On your age and how you feel about yourself, and of course how sex driven you are. But unless you are doing things that are hurtful to yourself or others i think its fine.
it might just be a phase or something...
but i dont know you that well soooooo...
I hope that helps!

im young so i guess that could b true. But the think is i only have this problem with people i dont care about. when i comes 2 people i do care about, i feel a shamed. does that make since 2 u?

That is, get a clinical opinion. A rube like me on a posting board isn't likely to help much.

Chances are that you're a nymphomaniac. It can become a serious condition (you can start sexually abusing partners when you get older, even if you don't mean to) and you probably should get help.

If you want to read more about it:
link

don't reliy on sex for happiness, it's just showing you are comided to your partner forever