How can I not feel bitterness when I see people in love while being alone?

I'm almost 30 and a kissless virgin. I've accepted that this won't change (unless I pay, but I don't want to for now) and I'll die an old virgin jerking off in front of a screen. When I'm alone and living in my isolation I don't feel bad about it, I do my own thing and that's it. It's worse when I'm in places where there are couples or other people in relationships. Is there any way I can get rid of this bitterness or should I just avoid such people and places?