I NEED to move on from this pain

Hey hi, I'm a sad 16 years old here lmao.

I just got out of a year & a month-long relationship, (FYI, he broke up with me on my 3 year anniversary of being sober from overdosing.) (October 18th) &&& that hit me real good. I am still diagnosed with anxiety. I'm not depressed no more but I've been carrying a heavy heart for so long. I do not want another relationship, & I barely have friends to hang out with. I'm doing track but it doing nothing but tiring me. Any advice to get over this asshole?