When I got heart broken so many years ago, I hit the court, and developed a killer cross over dribble, and a learned a few techniques for a better butterfly stroke. I was like you, hurting bad, and didn't want to be around people, then the anger came down and I could just sit. I worked hard on that cross over because, I was to mad at the world to do anything else, so every freaking day, 2-3-4 hours. Couple of weeks later I was running rings around 'em, and I wasn't mad, or angry, or sad, or depressed. By the end of the second month, I was partying with the guys I was playing with, and one of them had a sister, who had a friend, and we hooked up for a few weeks, and she dumped me, can't remember why right now, but what's s a guy to do? Back to the courts, the pool, the darts, BOWLING, yeah I love to bowl, to bad I was never that good, but always had a great time, and met a lot of great people, and that was a great time. Never did worry about filling that void ever again though, because I was having too much freakin' FUN.
The point, if you get off your a$$, and do your thing, healing goes better, and faster because, time flies when your having fun. Forget the masks my friend, just be yourself, and do your thing, because who cares if they like you or not, who cares if they accept you, or not? Who cares if they reject you, or not? It doesn't matter because you love yourself more, than they hate you.
Trust me guy, no female is worth all that, until you meet one, and you will after a proper healing period, that will be better than the others. And the good news, you can enjoy many on the way to meeting her, so this is hardly over with, its just this one got away, her bad, the next one will be better, so you better hurry, and learn how to cope with your losses, because, your missing a lot sitting there feeling sorry for yourself, instead of doing great things for yourself.
Come on, no more romantic sick thoughts, get real with it, and get up, and see what you can do for you.