Anxiety over partner's feelings

dude im not even kidding im so fucking scared rn because i think hes losing feelings and i really hope he isnt but like what if he doesnt love me anymore? What if he finds someone better and realizes I'm not good enough and breaks up with me? im so fucking scared dude like do I try talking to him about it? I would if he wasnt on DND. but what would I even say? ughhhhhhh kms dude