I've been having this problem for the past few years. I had a friend who I asked to hang out with him 8 times and I asked him to return the favour, maybe just a few times but he wouldn't. The relationship I was in, I asked that guy repeatedly out for 8 months every week without fail. Yet, when I asked for the favour to be returned, it never happened. I ended up dumping him. Now, with a friend, I've had for 14 years, I thought if she'd set it in her calendar to ask me to hang out every second month then I'd get invites. But obviously, she didn't even do it. I feel like people are so selfish. I act normal, I don't have one-way conversations and I'm likeable (as told by my friends). But no one wants to put the effort into inviting me out. At this point, I feel like there's no point in going out. I get anxiety after a while if the people who I've asked don't return the favour. I'd rather protect my mental health.