Was dumb on last relationship. Im not sure what to do from now on or in the next one.

In my last relationship, i (m17) stopped caring about looking stupid. And in the end i was, i just let myself go there, and it ruined stuff. Other than me just sucking with her (f17), she started looking down on me and listening to me less. Now im concerned about the next relationship.

I dont wanna be the stupid one, but i also want someone on my level, and that i can not care about it really. Ig the problem is finding someone on my level, staying on their level, and still being comfortable. I get that i should strive to find someone who lets me be my best self and i shouldnt let go down into mediocraty, but what can i do? Whaut should i look for?

Im afraid of losing my individuality and self respect, leaving everything to the dominant side in the relationship. Im afraid that i cant let myself not be the dominant one

Our relationship was a few months long

Tl;dr- im afraid, i dont know what relationship to look for and what i can let myself be on the next one

Note: At some point it just became a pit of thinking about things less and less, without self respect or critical thinking. At the end I was just an uncriticizing huggy bear, not knowing when to act how and leaving the thinking for her like a wife from the last century and her husband, unable to think in the direction of emotional intelligence. Hope im not giving the wrong idea but this is my perspective rn