he used to be clingy but not anymore

before, my boyfriend used to be sweet and clingy with me. and it was rlly cute. when i want to study (im in college), he would want to video call bcuz he said he wanted to see me doing my own thing and it makes him happy. he always compliments me that im pretty, i look like a goddess, etc. every time he sees my pics. he was clingy in a cute way that made me feel so valued.

but one year and three months into our relationship, he slowly stopped being like this. and the tables turned, i was the one who became clingy and it wasn’t even healthy. i became jealous, controlling, and highly sensitive to what he does. i miss how he used to be. he rarely gives compliments to me anymore. he is even more into posting about his celebrity crushes that he is attracted to. and i have to tell him he’s not being sweet to me anymore, for him to compliment my photos or reply to my sweet messages. and nowadays he is really busy with his own personal life to the point he cannot reply straight to me.

i cant figure out if this is just:

1. a phase that couples go through, like fighting constantly after the honeymoon phase
2. he’s losing interest in me or he’s not as in love with me than he used to
3. i’m just insecure, and i ruined everything bcuz of that. and now his treatment towards me changed

is this normal? i really want us to work out. i really miss his sweetness before. will he still ever be as sweet as before? this is my first relationship, and idk if im doing it right or we’re doing it right.