its no biggie, my fault, its just one of those things. neither you or the guy was lame, just looks like like an awkward situation, your talking to some dude and suddenly you find out he's an old dude. Same if I was talking to a girl and find out she's under 18 or 21, whatever is acceptably creepy to the individual. My gf is 26 so I date younger women, not a big deal, the age difference is barely noticeable.
You are not lame, sorry.
it's okay. it really happens. i still attract guys online that are too old for me (it makes me think i'm a magnet for men too old for me)
anyway, back to things we find lame.
i remember a session in Philippine Congress that at the heat of the argument this happened:
congressman: this is stupid!!!
sergeant-at-arms: the word "stupid" is not allowed in the halls of congress.
congressman: okay (trying to recompose himself while finding a better word) ... this is VACUOUS!
(i can't believe the word "stupid" is banned)