How to get rid of him?

So around last year I slept with someone for the first time and I thought he was the right person but as we progressed I felt all he wanted was sex from me since we never really went out or did anything except for fuck. He would get mad at me and ignore me then he would make me have sex with him so we would make up. I started ignoring and started seeing this other guy but he won't stop calling my phone showing up at my workplace snd calling me to have sex with him. I haven't told the other guy about the fact that he still bugs me. Should i get a restraining order so he leaves me alone? Remind you this guy us 30 years older than me and he has a lot of connections.

How to get rid of him?
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