Hmm....
I think it's more of a self-esteem thing created in your teen years than a lack of ability to trust others. But I know what you mean, about thinking the compliments are fake.
However, most of the things you judge yourself on are subjective. e.g.:
you
- might think you have terrible hair, but someone else might truly think it's beautiful
- you might think you didn't do a good job on a project, but other people might appreciate your hard work, dedication, people management, time management
, etc
The list goes on. Just because you disagree with the other person, doesn't necessarily mean that they're wrong, geddit?
Also, sometimes people give compliments just to be nice (e.g " what a nice dress" while thinking "i don't care about clothes at all, but you have a unique style, so maybe this comment will break the ice and you can like me better").
In my opinion, people usually don't give compliments to hurt or make fun of you, not at this age. Even if they're being nice, they're still vulnerable because they want you to like them. And they're paying you an implicit compliment: they care about you enough to try to make you happy.