relationship between art and me

hello, there is one thing I'd like to talk which is (as the title says) the relationship between art/music and me.

I started getting into art, more specifically music, when I was around 14, when my cousin taught me of FL Studio, then I started digging more and more into music and nowadays I pretty much know any sounds, musical genre and their typical sounds, underground genres and stuff.

after a couple years of making music I got better at doing it until I had rough times with life, relationships and mental health so I decided to stop for some time and listen more and more to music. 

a year later I got on FL Studio and at songwriting again, then I noticed how much I got bad at it, I used to do this crazy songs and beat with some melodies that were sounding great, now I can't write anything at all meh, melodies don't come at me, either chords or lyrics which makes me feel bad and tell me "why can't I be a great musician again? what's wrong with me?".

I don't understand if it is my creativity/imagination dying or something but it's making it really unfunny and it's making me really sad, if someone can give me some advice I really appreciate it, thanks.