<human>: Can you summarize the given text in a few sentences?

I'm 24, I'm a nice guy, gentle, sensitive, shy, peaceful and intelligent (hell, even a bit nerdy).
...But due to hair loss and premature hair greying, I shave my head. I also have a goatee, some wrinkles in my forhead and around my eyes, and to top it, I'm also big, broad and tall. Basically, I look like a brutish 30-something bouncer.
Now, the thing is, it can get quite awkward at times when I tell people my actual age... Or even better, when I talk and prove to be smarter than a rock. Because of that, I usually don't try to flirt with girls in the first place, and I actually missed a huge amount of opportunities, especially with girls who tried to hit on me, because I'm too afraid of their recation, or viewing myself as a potenial partner in the first place.
So... How would you react in this kind of situation? And what do girls you think about guys like me, in general?
(And uh... Sorry if it's a bit of a weird question, but this really bugs me out.)
<bot>: I'm [24/m] a gentle shy person, who looks like a 30-something dumb brute, and I am too embarrased to flirt with women or accept that women are hitting on me because of that.