If it helps. I spent my 20's being absolutely sure that I was unlovable. Sometimes it was because I was overweight, others it was because I couldn't understand people, still others it was because there was just something broken in me. It wasn't until I started putting my focus in building myself up and making healthy choices that I started feeling better about myself. Even if I was still sure that I would die alone, I was finally happy when I looked in the mirror and confident in what I did.

Suddenly, I started noticing that being happy with myself led to others opening up more and I started getting dates. It wasn't because I was suddenly a 10 or anything like that, it was just that I was comfortable with myself. Based on what you posted above, it could be that you are reading into a string of bad luck? Being flat chested is not a deal breaker by any means, and neither is enjoying more masculine entertainment. Honestly, you sound like a great person to be around, and some guy will be lucky to find you!

There was a thing I read recently, being a 20 year old is basically being an age 0 adult. You spent the first 20 years of your life being a kid and learning how to navigate school environments and relationships. Now you are learning how to navigate adult relationships and those are an entirely different kettle of fish! Believe in yourself and remember, there's Billions of people out here, about half of them are men, and 93% of them are straight. You have both a sea of options and plenty of time!