I'm 21 btw and started pre-school when I was 2 years old and he was 3 years old. We could both walk/run and talk to some degree at that age and we always stuck together since then even till now. It's just rare
but we would take a bullet for each other without flinching.
Btw yes you can change. People can make drastic changes in their life all you have to do is know how much you want it. Don't change because something made you such as the gangster who becomes religious because they got shot and lived, the alcoholic who goes sober because they blacked out not knowing where they were regularly or in your case the liar who's lies caught up to them and singled them out to be a loner.
It only gets worse as you go through adolescence because like the entire majority of teenagers will go through a slump phase where they struggle to find who they are. It might be so short they never notice or long and agonizing, but it depends on your mental strength and right now you seem like you would sink. It's unavoidable so on some ancient proverb S### you have to be true to yourself before you can be honest with others and that will show you the way.