In case you don't know, 'used to' in Thai is เคย.
There's a song from a few years back where the lyrics have been translated and has some helpful expressions with 'used to'. It was a big hit in its day and is still a great song. I've attached the lyrics with transliterations, and the song too so you can sing along. I learnt quite a few new words in it, including Teardrop, (yok nam ta) amongst many others.
Lyrics:
https://deungdutjai.com/2012/01/15/reudooraunparadox/
And song: (old classic)