To answer:
a. Yes, that area should remain sensitive, and be thankful! Since you're uncut, you have your frenulum, which is a very sensitive area--a real trigger point. I'm loosely cut and have an intact frenulum. At times during the day I can feel skin sliding on it. In sexual situations, you'll just learn to deal with it, and direct your partner how to give you the stimulation you want or need.
b. Most here would say there is no such thing as "too much masturbating"; however, you've reached the limit of practicality when you're addicted to it and can't function in the rest of your life without it being centered around it.
c. Oral sex is great--giving and receiving. Don't worry about trying to find a willing subject within a certain timeframe, or trying to convince a girl...it'll happen when the time and person is right. In fact, your move may open up doors to meeting a girl. | 
