It's very difficult for me as well. I don't have a huge social circle and I'm used to and comfortable being on my own - have been for a long time - I'm very independent and I'm cool with that. But, it does get difficult sometimes. If you really want to alienate yourself, stop drinking alcohol as well - then you'll have zero friends to hang out with, LOL
But seriously - sometimes I just feel like no one cares - about anything. The animals (of course almost everyone I know has pets and they adore them, but they don't make the connection with the animals on their plate), their health - even when everyone around them is sick or dying of heart disease, cancer, diabetes, etc. When they have have all the information (and have read it), and still continue to eat meat out of "tradition," it utterly boggles my mind. And this season is especially difficult, what with everyone celebrating all of the holidays by eating turkeys - and posting photos of it all online - it's sickening and depressing.
What has helped me is finding a couple of vegan Meetup groups who get together frequently. It's really nice to be with a group of nice people who are on the same page. Maybe try to find on in your area? It helps to give you a small sense of hope that at least *some* people are getting it. Also - keep in mind that while there's only 1-2% of the world's population that are vegan, that is millions of people, and that number is growing rapidly. Things ARE changing, and I believe they will change - to the point where eating animals is the exception, vs. the way it is now. It doubt it will happen in my lifetime, but I believe it will happen.
My 16 y/o son was raised pescatarian from birth, and he recently gave up all dairy & eggs because he realised it exacerbates his acne, and he has learned that eggs aren't good for you, and, he's learning from what he sees around him (sick & dying relatives). I'm still working on him with the fish and oil, but I'm proud of him, and it gives me hope that people can and do change.
Try to look around you and find people who give you hope - they/we are out there, but because we are a smaller segment of the population, we're just more difficult to spot (and, contrary to popular belief, we really don't go around screaming "Go Vegan!" wherever we go - I don't, anyway.