Re: Young. Lonely. Scared.
I'm a 52 year old male that has suffered 51 yrs. of suicidal depression. I have been a Christian for the last 20 years and will always love God very much, but alot of church doctrine is very neglectful of the pains and sorrows of the heart, no one in the church should ever have let you be lonely.
Many of the experiences you mention were very much like mine when I was your age, but, believe me, if you don't address them now, they get worse, not better. Man, as being made in God's image (innocent, truthful, etcetera, meant to live in a paradise) will just naturally find this world of corruption and hostility to be very harsh. Some get used to it, others with a more tender heart (like yourself) refuse to because they prefer to still live in that paradise (ease up on yourself, you prefer God's ways).
You can "feel" loneliness more than most people (that walk past you) because you are a very loving person and you can see that this world is not all fantastically beautiful because you are smart (wisdom). There is alot about you that would make you a person that others would want as a friend. Don't be scared. You will even sometimes notice that some people will (subconsciously) feel uncomfortable around you because they sense that, by comparison, they are not "all that". You are a genuinely righteous person (not SELF-righteous, but humble to conscience, you know, the tree that Adam and Eve ate from). Get to know who you are, that is the only way we can live happy lives (after all, we were made in the image of "I am who I am", Exodus 3:14).
Learn to be comfortable with SELF and accept yourself, then others will accept you too.