I am 25 and I am still a virgin!

I am not one of those people who are waiting for marriage. I just want it to mean something. Doesn't sound too bad, right?
Well, I've never had a boyfriend, and unless you count elementary playground crushes, I've never been kissed. I feel like a loser! I am incredibly shy and on the heavier side. I know I have low self esteem. I am so terrified that I will die a virgin! I think I better start dating and such but then I see my sister in an abusive relationship and I hear co-workers complain about their men and I think, do I really want that? I have a vibrator that I occasionally and I have no idea if I'm doing it right LOL. My friends say if I use it too much I might de-sensitize myself and then I'll never O with a man.
Is being a virgin a big turn off to men? I have a friend who is my age and still has her V-card so it makes me feel better, but she has had opportunities and has turned them down. I've NEVER had the opportunity. Sometime I feel like if I was JUST heavy, of JUST shy, or JUST a virgin it would be ok but I'm all three! What do you think?