What to do after buildup?

So im pretty new to songwriting (even tough i used to play the piano wich helped immensely), i use software like fl studio to create tracks. The problem is, I always have this buildup of tension, for example first i have some synth chords, then i add drums, then i add another synth melody and bass, then i add a piano wich plays the main melody, etc etc. The problem is i just cant keep going building tension and never releasing it... so what do i do when i have a decent buildup? Btw the genre is electronic/house music

I already had a project where i had this exact problem and then i thought imma just make a new track and now i have the same problem again... no idea what to do after the buildup. Also i dont want to repeat the same melody for the entire song lol