I want to lose 100 lbs so nobody sees me as a big guy anymore?

No you won't but you will look disproportional. My suggestion to you is drop to around 200. You should be good there. Then again girls don't always care about size so they say. I have a fat f*ck friend that is 6'8 400 pounds and some how he pulls non-behemoth looking girls just by walking up and running game. So hope my useless tips help!