confused bout my ex

first i'm sorry for my bad in english.

first im top and my ex bot. we had broke up around 3 years. and a month ago accidentally i go to his bday party cause my friend invited me and my ex didnt know that. after that bday party. i intense to communicating with my ex. sometime he want me to sent me nude pic or vid and i sent to him. the question is what next step? sure i want he back to me. but... he never want to dating with me he always want to go out if i or hin got another companion. and he always use statement we just friend nothing at all.

ps:
- when we become a lovers 3 years ago we only had sex 2-3 times cause he is very religious and want healthy relationship. (relationship with me only 6 months) , after broke up with me he made relationship woth another around 5 months and he tells only 3 times had sex.

what should i do?