Is there somthing wrong with me?

alright, it all started last summer... i got a major anxiety disorder... and i was afraid of EVERYHING, and i hit a major state of depression, and then i had to watch my dad die, i saw the life fall out of his eyes, and then i got this girlfriend that i thought was the answer to all my problems... but turns out she is a big tease...you know... other guys and stuff, but i still loved her to death, and now its summer and her dumb *** parents hate me so much that i cant see her all summer... and my other best friend my grandma died... and now it seems like ALL of my sadness and depression and anxiety just disapeared... to be honest, i dont give a damn about anything... i feel like...idk a man i guess... im not afraid of anything, i dont flinch, even today i went up to this HUGE black guy and flipped him off for calling me a dumb ***. i love this girl TO DEATH and now i wouldent even care if she left me for anothe guy, i fell off my house woring on my shingles and i didnt feel it like i should have... is there somthing wrong with my brain? or somthing?