He says that we are only friend" but always flirt with me and acts as a bf!

Dear all,

First, I am sorry for the small mistakes, english is not my native language. I need help because this guy is driving me completely crazy. I posted a message about it few months ago but can’t find it so I am creating a new topic.
This year in class, I met a guy who is 26 years old and I fall in love with him. I thought he also fall in love with me for different reasons:
-He was always looking at me and blushed when i was smiling at him.
-He organized my birthday in class and contacted the teacher (i didn’t tell him it was my birthday). He also said “that he organized it because it is for me and he won’t do it for someone else”.
-He always texted me, called me all the time, complimented me.
-He asked me so many questions about me and my family and even people in class thought we were together.
-We were talking for hours about child education and even wedding! For me he was my soul mate we just understand each other.

Few months ago, I told him that I like him and that I want to have a drink with him but he refused and said that we are only friend.
I was ok about it but his behavior changed. He became even more attentive and acted jealous when I was talking to a guy. I just couldn’t talk to a guy friend without him being around and acting jealous! Also, he was always spying on my social media profile, and always asking me “what do you do at night? who do you go out with?” Furthermore, we were always together and spending our whole week-end working together.
He came to have dinner at home and we talked together and i had the courage to tell him that I want to kiss him. His answer surprised me again “What? Are you still thinking of that? I told you we are only friend” and then he left my place and said “See you tomorrow at the library”.

The next day, he started flirting with me (touching my hand) and I didn’t say anything. He was spying on my phone when I was answering to a friend. After he told me that, I tried to forget him but he doesn’t let me forget him as he acts as if he was my boyfriend!
-He called me everyday
-If i talk to a guy he becomes extremely jealous and he doesn’t let me ! He comes and starts monopolizing the discussion
– I told to another guy friend that I was planning to go out for the night, and the guy i like said “what? why are you going out we have class the next morning!don’t go out!” and the other friend said “She is free to do whatever she wants”.
-Few days later, he even invited me to have lunch.
-we also had lunch with another friend and he played footsie with me! I felt embarrassed and did nothing.

Another point that I didn’t mention is that he is jewish and i’m not (muslim parents but not practicing). He told me that “he could convince his parents to marry a non jewish”

I absolutely do not understand why his behavior shows that he likes me but he keeps telling me that we are only friends. I trie to forget him by dating other guys but it is very hard because I just can’t.

Could you please help me? What should I do? What do you think about this situation?