Victim of the SSPX, When we first came to tradition my husband was much put off by the seeming aloof chill from the parishioners. He was raised Protestant where church functions were always those happy-clappy events where everyone was love-bombed. By comparison trad Catholics seemed really stand-offish to him. I had to explain to him that we Catholics go to Mass for Christ, to receive the sacraments, to fulfill our obligation- and if people are nice and friendly then that's a plus, but not important. You go to parties for fun and friendship, not Mass. He had never thought of it that way. He began paying more attention to the teaching and less to the people, realized that Catholicism was the true religion, and converted.
Most people are indifferent, some are jerks. It's a fact of life, unfortunately, regardless of their religion or lack of it. There are hypocrites in every crowd, everywhere you go; theater, grocery store, doctor's waiting room- but that doesn't stop you from going does it? So go to Mass. If they don't like you, so what? Receive your sacraments, gain edification from the sermons, shop for good reading in the bookshop, then shake off any funny looks or comments thrown your way, and just keep going. Look for friends and activities elsewhere and reserve your dealings with the priest and parishioners as "business only", if you must-- but go!
Rejection is always painful, especially when it's prolonged. I know that from life-long experience as a square-peg. But you know what's even worse? Hell.