Hitting 30 feeling lonely but strangely ok?

I hit 30 this year and it feels like all my friends are coupled up.im a little bitter that it feels like they only reach out when things are going wrong or when they need to vent. I'm hitting this weird stage where I'm lonely and have no idea what to do with my life. There is no chaos, no dates, work is chill, finances are good ...

Anyone else going through this? My friend is trying to get me to join a sports league but I've always kinda been more of a solo sport person (yoga, swimming, running ,kickboxing) I wanna meet people but also don't wanna meet people lol

What are you guys up to these days?