Your fears are justified because they make a kind of logical sense to you, even if others may not see that "logic." While I totally understand wanting to hide parts of yourself when you're young or just entering into a relationship; I would hope that as you became closer with someone, you could be more open with them and they would be understanding. No guarantees in anything in life; but if someone cares about you, they care about all of you. Your fears, anxieties, and phobias included.