Im going to have to agree with you, it doesnt sound like your paranoid, but your definitely not alone!.....it is perfectly normal to not be outspoken about your illness, as it is not considered a "normal" illness yet, in this day and age....just think, how many people have you met told you they were depressed?....exactely, its not a common thing to tell somebody.....i feel that if you tell 2 or 3 people closest to you the situation in detail, youll be greatly rewarded(from within).....
...about the boyfriend thing, yes a bf might not handle your depression the way youd like early on in the relationship....you might want to search for a loved one who you think is capable of handling personal matters in a mature way.....also, i know its tough, but id recommend waiting for that time when you feel your close enough for your guy not to run away on you, yet not too close where your making plans to move in together!....try to find some happy mid-point.
Hope this helped!
-Tman