I'm getting truly scared for my safety & need urgent advice!

I need honest opinions because I am bad to just carry the whole load on my own shoulders and to just blame myself. I have a guy friend from a college I'll be attending in the Fall. His name is Skylar and he is a very caring and nice person. Honestly he is so nice, that it gets overwhelming. I knew from us talking in the past, that he is super clingy and very smothering. This is 3 years later, so I thought "what the heck?" Maybe he's grown up and he can be my college friend to help me out and get use to things. I notice through snapchat that he gets irritated if I don't snap back, and he always asks to see my face. Which is the start of him becoming kind of obsessive. So he invited me hiking with him and his friends over spring break. I thought it would be fun and alright because we would be in a group setting. He kept calling me beautiful and amazing. It was making me feel very uncomfortable, so I let him know that he doesn't have to let me know that I am beautiful and amazing all the time, but I do appreciate the compliment. Once we got in the car, he kind of flipped out about it. He started hitting the steering wheel and getting angry because I didn't feel comfortable with him giving me compliments all the time and hugging me all the time because we are just friends. I also have just got out of a 2 year relationship. Anyways, we went out to eat. At the table he started getting angry because I was on my phone and not taking very much. He said I was being "antisocial." I was with people I barely knew, so of course I was being naturally quiet. Then on the way back to my house, he got angry because I just wanted to listen to music instead of talk. Then I felt sick to my stomach and told him goodnight and all that because it was late and I wanted to go to bed. Then he basically forced his way into my house because he wouldn't just settle saying goodbye in the car. He argued for a while because we didn't talk enough and he wanted to know about my mental issues. (I suffer from anxiety and currently going to counseling for minor OCD.) and I explained that when a person has a mental disorder, they sometimes just 'don't know' what is wrong. Finally he left. Then he called and I didn't answer the first few times. When I finally answered, he was yelling "why are you ignoring me! You left your wallet in my car!" So then he had to come back. Finally he left again. Then last night he invited me on a 'friend' date which was actually a one-on-one with him and his mom.. I politely declined on the aspect that I just got out of a relationship and I simply don't feel comfortable with it, and he kind of lost it. He called me over and over and over. He even said he was going to drive to my house if I didn't answer the phone. I finally answered and he was being so crazy. I explained and said, "Skylar we are friends, I care about you, you're an amazing person, just because I don't want to go on this one event with you, doesn't mean anything is wrong." Then he kept just loosing it. He even started punching himself in the forehead.. I don't know what to do honestly. I'm afraid that he will truly hurt himself if I just say goodbye all together. It's weird, because he's completely normal with his friends. He's just obsessive if he really likes a girl. Maybe there's an underlining cause? I know he has a fear of never finding anyone to spend his life with. I feel bad because I do ignore him a lot and i kind of talk short with him. I can't help it though, because I get such bad vibes from him. Talking to him or even seeing him makes me kind of feel sick to my stomach. I can't really explain it in all honesty. I don't know what to do and I would appreciate any feedback or advice. So sorry for such a long message, I just felt like I needed to lay it all out there. Thank you to all you beautiful ladies in advance!