First, I sympathize with your pain. Don't let your lack of sex be something that reduces your value because it doesn't. For example, a masters degree is an achievement! That means you have a square mind on your shoulders and are willing to work hard. Those are admirable qualities.

I'll also say try not to listen to closely to the stereotypes. I see two in there, one that flirting will be considered harassment if you aren't good looking and the second is that women (or people in general) can't be sexually attracted to someone who isn't "good looking." The reality is many people are a lot more open minded than that. Tinder helps, and if you're more open minded as well about whom you're willing to be with, you might find someone fun and be surprised that you were never as unlovable as you thought you were.