Friend is too clingy?

This has been going on for a few months now.my "friend" is to clingy and is worst then my mom when i would go see other friends she will be like where u meet them how old are they who is going to be there worst of all she said what activities am i going to do with that person (which i took ually) i am engaged and would never cheat on my fiancee but when i told her that she had no right to say that she just laugh what should i do should i tell her to eff off and leave me alone