Break up

My ex and I broke up 2 weeks ago and he seems really happy he’s been throwing parties and hanging out with friends and not texting me at all. We broke up bc he said he didn’t love me anymore which hurts bc I was so good to him. I’m kind of mad he got over me so quickly bc we were together for a year a together like everyday and super close. Is this normal ? I tried to tell him I’m sad and he said he already had his sad days and to leave him alone if I’m gonna be sad and not drag him down with me . I thought we were close so I was Just trying to tell him how I felt:/ how is it normal to be over me just like that bc I’m a mess !