George, 6'5" is HOT. Being a big, strong, tall guy is not your problem. Your problem is that you're an asshole. You're sour to the core. Look at the title of your thread- "make" he be your girlfriend? Really? How about "convince" her? Perhaps you could try on "persuade" her.
No matter what you look like, your ****ed up attitude is going to kill every opportunity that comes your way, and believe me, opportunities come your way. At least once a week, I have no doubt that you encounter an available, attractive female that might be willing to give you a chance and you blow it every time by being a total grump.