one time my crush almost sneezed on me! yea...dont even think about it! man boobs, bubble butts, moustache (like the real deal), long beard, smelling like cigarettes, being too cocky and judging other girls, rating them...etc pretty much don't be a douche!
Don't lie, cheat, be disrespectful, rude, or lead her on. Also, try to portray good hygiene habits like freshly brushed teeth and breath, shower fresh and your clothes are clean. A guy who dresses nicely and is well put together is a real turn on. Finally, just be yourself, don't be cocky, arrogant, or egotistical because we will walk away.
Guys that smell...i really liked this guy and when we hung out one time he had major b/o so I didn't really like him much after that...also hanging out with other girls to make the girl you like jealous because usually it just makes them mad at you