Pills don't work.
Penis enlargement websites claim they are safe but again their techniques cause venious leaks in the penis and you basically have to be on the program for life. Many people who go to these sites end up experiencing problems later in life once they stop doing the exercises.
There is one thing that can enlarge your penis but it's extremly unhealthy. Taking a penis pill (say enzyte) with steroids and large doses of l-arginine will enlarge your penis. I don't need to tell you how bad this is though. 6.5 is above avg and is more than enough to allow you to be the best sex a female has ever had. Its more about aggresion and passion in bed than actual size.

Ditto, human

trying to enlarge your penis is a pointless and hopeless exercise. At 6.5" you are no way below average, and even if you were I would not recommend any kind of medical or physical intervention to change it. If you do, you are likely to waste time, money, and potentially do yourself physical damage.

Not trying to be health forum, but if this is such an issue for you then i'll say what i've said to people before - it's a psychological problem, not a physical one. Get a girl that's gonna care about all of you, not just your d!Ck. Or if not, get a hobby...