You can make friends online.
I met 4 women through mumsnet 15 years ago, met in London and again in the north of England. We have not met again but we are still in touch from time. They are great.
I also have a little group that was a spin off of the OLD threads, we have so many things in common apart of our perennial singledom, it has been easy to find a common ground and grow a friendship. Some of us have met with others in the group, I asume we will never have a full get together as some of them are not in the UK but, they have been the source of much support, fun and jokes, it has been great to have them around.
I have made a handful of very good friends in OLD. You know those that do not click even when you have so much in common? Great long term friends (plain friends, no benefits, obviously) we are still cheering each other if it looks like we have, finally, found the “one” 
And also, old friends resurfacing in Facebook. You may have not had much in common before but you may have now. I have got much closer to those who share my current circumstances or interests 