I turn down dates with chicks to play guitar all the time. It's always, "I can't party or go with you to the mall or talk on the phone because I have to practice." you are very much sane and you deserve the skill you have acquired, I can only practice 5-6 hours a day through the week because I'm 15 and I can't drop high school ( couldn't get parents to sign anyway ). You are not crazy and many fellow guitarists have talked with me about how easy it is to kill an entire day without knowing it, all the time gaining guitar ability.
Anything worth dedicating a life to is worth the full respect of your entire free time.
p.s.
smoking can take it all away.