My stalker

So my ex bf keeps bothering me. It’s been 5 months now and he still sending me emails saying” hope you had fun at the lake” idk how but he somehow is tracking my phone. I had to change my phone number twice because he kept calling me nonstop over 100 calls a day with private number. I blocked him from social media and now he is sending emails. I haven’t respond to non of them but he at least sends one a week. I started a new relationship with this guy I’ve always had feelings for ( my college crush) and it’s going great. I am really happy. Anyways my boyfriend been asking me about putting pictures with him on social media with him cuz he has been putting pictures of me but I am afraid my stalker might react negatively. What should I do? I don’t want my bf to think I’m hiding him.