severe depression paranoia

I couldn't consider myself an anti-social person, but I am somewhat of a homebody. I have a boyfriend who likes to party and drink and hang out with his friends. I have had depression since high school. I am easily hurt, sometimes this causes me to cry in public places, and I hate it. Last Saturday I went to a party and I was trying to have fun. Actually I thought I was. My boyfriend came up to me after he had just taken quite a few shots and told me that he had to ask the guy who lived at the house with the party if I could come over. I asked him why, and he said their was an incident with a gun when the guy let me hold it (I had never held a gun before) and then freaked out on me when I accidentally pointed it at someone. It was huge and made of metal, and i'm really small and petite, and it was just really awkward in my hands, i had to set it in my lap. I wasn't consiously aware that I had pointed the gun at anyone, and I apoligized, and told him that that was the first time I've ever held a gun and I thought the inncident was over. But last saturday my boyfriend brought it up again. He said "Drews not scared of you, you just really freaked him out." then he went along to say quit being a bump on a log and mingle. I'm very shy and these people are intimidating me for some reason, they are loud, un ruly, and basically everything that i'm not. My boyfriends friend came up to me and outta the blue he told me that I needed to lighten up. He brings up a situation I don't even remember. He asked me "Do you remember that time when I was jokin with you singing that song about a psycho-scitzophrenic? and then you freaked out on me? If i would have freaked out on this guy I would have remembered it. But I didn't. I told him I was just going through some rough times, and I'm depressed. I have it severly, and parania, to the point I get sweatly palms and my face turns numb, and I get the uncontrollible notion to cry. I think everyone is conspiring agains't me. I kind of want other peoples opinions about whether you guys think they were singling me out. Do you think approching me at a party about it was appropriate? Do you guys think I took this too seriously?