How can I truly be happy?

Ever since my ex and I broke up (2 years now) I've been doing a lot in life. Lost 90 pounds, going on hikes, camping, gym, I go out with my family, paying off my debt, etc a lot of things I didn't do when I was in a relationship yet I feel like my life is at pause. After all the work I've put on myself I still don't feel like I love myself. Every day I wish I could be in a relationship because I am sad and alone. Anybody else dealt with this? Tips? Advices? Thank you!
How can I truly be happy?
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