Trust your instincts. If you have to question if his jealousy is normal; then it probably isn't. He has no right to control you, especially when you've rejected him time and time again. This has "future abuser" written all over it, and it's not at all your fault. You've done nothing wrong! Please remember that.

I think it would be best if you did all you could to make sure he can not get in contact with you anymore or have access to your home. Be honest with your mom, let her known how uncomfortable you are.

I hope things get easier soon! Please be safe and take care.