I can’t find people to form relationships with.
How am I supposed to find a friend or even a partner, if I can’t find anyone to talk to long-term to form relationships?
Where are the other people looking for friends or partners?
How to solve this puzzle?
You could also join to classes where you can learn things. Pottery, knotting, painting.
Look for RC tracks, or warhammer, or train terrain building, or go and sit next to an airport / train station where you can watch planes /trains - there will be other people.
Meet up groups for free yoga in the park or hiking or even AA meetings if you want to avoid alcohol.
Get into cosplay, anime. Or even be a furry. As the other commenter says first step is you.