The "it gets better" saying is pretty cliche, because it has no mention of it being "it gets better, only if you try." But from what I read from your post, I haven't seen you mention what you did to get yourself socially to others. All you've mention is you going to the bar alone surrounded with people. But do you reach out to them?
I do hate how there are some people that would always like to point out to you for being alone, and being very observant and look for clues that you are a loner. I do understand by saying that, it accomplishes nothing but made the other person feel bad. Deep down, I think some of those people like those are self-insecure also about themselves. Or also it's no ill intent and they are suggesting you join their group like Paul said above.
But the important thing is again, you should get yourself to mingle with others, instead of just putting yourself in crowded places but not trying to build friendships there. If you get the "you're alone" comments, learn to adapt to them. Play them off or come up with a story of why you're alone to make yourself feel better. You're new to the area, looking to meet new people, etc. Most times, people do not really stigmatize you for this, and they understand and can relate. Especially with older people. A lot of them are lonely. It's only in grade school when being alone is consider being not cool.
Enjoy any good things, even the little and menial ones, as you will never know what impending distresses could descend upon you in a moment.
If I fail to adapt to the fault of others, it is my fault.