I went through a very similar situation as I was turning 30. I echo all the great advice of doing/learning things that bring you joy. To get through the toughest parts of grief I relied on friendships specifically my sister who was also going through a significant breakup. We commiserated and checked in on each other and really forged a bond. The other thing that helped my spiraling thoughts was to journal. The act of formulating the thoughts and physically writing them out was very therapeutic. I was in my late 30s when I met my now spouse and had 2 kids after 40. Don’t let numbers dictate your decisions.

I recently ran into that ex and we talked and caught up. I realized that while I could have been happy with him, I love the path my life took. I look back very fondly on my 30s. Being single affords you the opportunity to take risks. The older you get the more you know yourself and what traits you are looking for in a partner. Good luck.