What should I do?

okay so i don’t know why i’m still stuck on my ex. i’m in a new relationship. i have blocked my ex on everything. but for some reason whenever i see him these feelings and memories comeback. and i feel sad. and i be acting different around my boyfriend. and this one time he asked me if i was okay and i said yeah. because i didn’t want him to know what was going on. and the reason why i blocked my ex was bc he always kept texting me “when are we going to see each other again “ or “ when are we going to fuck “. but i also be getting jealous when i see him with other girls at school... so i don’t know what to do to stop feeling this way about my ex.
What should I do?
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