I grew up in a church that I considered my family. I had friends, and people I could relate to. There were other kids my age, but also adults in the church who took it upon themselves to be good role models and second parents. I was truly blessed. I grew older and the world pulled me away.
I came back to the faith thirty years later, but I no longer lived close to my home town church, having moved to another town to be close to work. At first I looked at my old church through its online presence, and considered making the drive. I decided that it had changed so much from what I remembered that I should take a chance on my local church instead. And so I did. What I found was a welcoming small congregation, and it felt like home. I'm sure it being my denomination helped.
However, my local church congregation consists mostly of families with kids younger than me and people older than me. Everyone seems to be married and have kids, or elderly, and so I haven't even tried to reach out, being a single person. The pastor is over three churches, so he isn't at the church but maybe once a month, which makes it even more difficult.
I have online friends from my denomination on this forum, and friends of other denominations too. I speak with them in private conversations here and talk with them on the various forums. I interact with people like yourself, so I'm always making new acquaintances and friends.
Outside of Christianity, I have a few old friends who are non-Christians that I spend a few hours with every Sunday playing disc golf. I have online friends that I know from my participation in various communities, but those friendships tend to stay within the community setting. Having non-Christian friends gives me a chance to witness to others by example, and through conversation.
I guess what I'm trying to say is my Christian friends are pretty much right here on the forums. It is a great place to meet people and converse. I understand that it's no replacement for a good church family, but it's something.
I know if I hadn't put myself out there, I wouldn't be where I am, so my advice is to not be afraid to try a new church, or to start a conversation with people, and get to know them. You can make friends in the most unlikely places.
If you need someone to talk to, or bounce some ideas off of I'd be more than happy to listen and give an honest view. Know that you are not alone. We are all a family in Christ.