I 28F have extreme problem with very demanding (M) childhood friend

I have this problem with a childhood friend. I've known him since preschool, we spent a lot of time together, visited each other as kids, and were classmates in elementary school. We also hung out as teenagers and spent a lot of time together. Despite him being my best friend, nothing ever happened between us, except for one time when we kissed, which led to hugging, and he then asked if he can touch and see my boobs. I didn’t mind because we had known each other forever, and he had seen me in a bra. This happened when we were still teenagers. 

The problem is that he started controlling me more and more. Like I’m at home, and he’d suddenly call saying he wanted to go out, but he was already standing at my door, emotionally pressuring me into going out. Even when I agreed to go out for a short while, just for a few minutes, he always found excuses to keep me out for a long time. If I agreed to have just one beer, it always turned into more—I'd tell him I needed to leave, but he’d order another one at the bar. Or he’d suggest going for a walk, but I already knew he’d want to go here and there and wouldn’t take ‘no’ for an answer. He also couldn’t stand it when I had a different opinion on something. He always needed to be right. When we talked, he would always stand extremely close to me, which made me uncomfortable. I told him this many times, but he kept doing it. He constantly demanded my attention and wanted to be around me all the time. 

I had enough, so I started acting colder towards him. That’s when he became even more relentless. I didn’t know what to do, so I started avoiding him, not replying to his messages—I basically ghosted him because I didn’t know what else to do. But we lived close to each other, so he kept running into me. Then he left for a long time abroad, and I finally had some peace. I didn’t reply to his messages, I started ignoring his calls, etc. Years passed. When he returned, he sent me a message saying that his mother was dying. But I just couldn’t bring myself to reply because I was already mentally drained from him. Then he happened to see me outside and confronted me, saying he just wanted to talk in difficult times and couldn’t understand why I had stopped writing to him. So I explained it to him. I felt bad afterward, and shortly after, his mother passed away, leaving him completely alone.

But then he started being pushy again, and I really didn’t know what else to do except ghost him again. Years passed without contact. He sent me a very long message about his current life, which I ignored. In the meantime, I started feeling guilty about how I had treated him.

A few days ago, I randomly ran into him again. He immediately reached out to me, asked me to grab a coffee, and even though I had no time at all, I went with him. It was actually kind of nice, and I was happy that maybe this could have a happy ending. I arranged another meeting with him, but after that, he wanted another one right away, then another the next day. He started calling me again, texting, followed me on Instagram (he pressured me , and sending me pictures from his trips—him sunbathing at the beach, working out at the gym, showing off his muscles. He started texting about how he talks about me to all his friends. Whenever we were together, he was just as annoying as before, standing extremely close to me, trying to touch me. I’ve had enough of him and don’t know how to get rid of him. Ghosting again?"