Once you figure out that life can be viewed as having no meaning, then you can accept that life is simply what you make of it. The art you choose, the faith you choose, the behaviors you choose, etc...
We have habits embedded in emotions and memories too, and that takes work. Sometimes, structuring our environment including people can help out.
However, you can be happy without people in two ways I have found. 1) Find a way to help humanity that you can work on (so that later they'll accept you);... 2) Act as if the world and universe IS a person, that way you can meditate like buddhists and be cool.
Both will help ya, and as you gain a lil confidence or success in that, you'll reach out a bit more to people.
Yeah it comes down to you mostly gotta give love if you wanna get love, but you gotta choose what meaning of life you'd LIKE to believe in first, accept it, and then you can move on to things like accepting that you are unique, though, the unique thing could help you in the short term too, like a bandaid
edit: yeah its hard when you see people giving you advice but really just shitting all over you in the process, but remember man, you seeing and realizing that just means you have wisdom. You got to accept that people often don't have it, which means you either can disregard people, or lead them. People are easily influenced, and as sad as that is because they can do things like judge a book by its cover, it is also a good thing, because for example, people are hardwired to reciprocate smiles...