Is my character a Gary Stu/Mary sue?

Heh, i got negitive answers on my story. Gotta change it a bit... this is the main character i sorta love him (brother like xD) BUT im willing to change him... So critic him? (also his looks is probably a Gary stu trait.... Just warning i don't wanna change his looks :c) His name is Xavier (i still need a last name) and he has Blonde shoulder length hair (long) and blue eyes. He is a normal peachy skin color. He wears a dark pink hoodie, black skinnys, and black boots. His personality usually wards off "fangirls" and people who try to talk to him... Therefore he has no friends at the start (Keep reading its not what it looks like) He lives with his grandparents since a gang killed off a huge portion of his hometown. He acts rather cold, and rude. He tends to keep quiet most of the time unless there is something he HAS so say. He is a smartass and sarcastic a lot, when he does talk its usually an Insult, smart comment, or a simple "Get away from me.". I will not lie, he does has a sad past but he dosent angst about it and cry. Also remeber how i sad "he has no friends"? He dosent care. At all. It took him a while to consider Indigo (another character who continues to bug him, Indigo is completely oblivious to the fact Xavier hates him in the first 2 chapters, its not till Xavier yells it out that he hates him... Even then he continues to try and befriend Xavier.) a friend. So far he dose NOT fall in love with any character. And i plan for him not to...... I mean it... There is a humorous scene where this idiot princess stalks him... He ends up blurting out he's gay to get her away from him... Out of extreme frustration. It didn't work. It brought out her "Yaoi" loving Side..... So... What do you think? Oh he's 17 btw