Should I tell this guy I know I love him?

Ok so there is some history to this story. One day I went to school and I got off the elevator and when the door opened I saw this guy sitting there and instantly I was madly attracted to him but I didn't know who he was, I only knew he was in the same major as me . It was without a doubt def love at first sight but there was nothing I can do because I didn't know him at all so I chose to just forget about him. A few weeks went by and we were on winter break and randomly I started thinking to myself " I wonder if that guy I saw will be in any of my classes next semester" but then I figured he wouldn't be because he was older than me. To my surprise when the semester started, he was in one of my classes. I fb friended him and I told him hey you dk me but I am in one of your classes and whatever and then we started talking and he was very very nice and to my surprise I found out he was already a published author and wasn't even done with college yet. I didn't talk to him actually for a few weeks after that until one day out of nowhere he randomly commented on my fb post, something he doesn't usually do. I had wrote that I was studying for an exam in the class we had together and how I was freaking out because it was so difficult. He commented on it and he told me what to study and then I asked if he was around on campus so we can go over the material together. He was and he came to the room. The second he walked in I immediately felt the same intense feeling I felt for him the day I saw him when I got off the elevator. I didn't know what to say or do. We went over the material for the exam and we talked for a little while. I asked him for his number and I told him we should go over this stuff more often together because it helps ( it really does help , its not that i wanted to be with him ha ha) . I texted him when the exam was over to ask him how he thought he did and we were talking and what not and I was telling him how I had some personal problems effecting my studies this semester like the fact that my ex bf who I was with for a long time broke up with me in a very degrading way and how it really made me sad and then he told me that he was with someone for a a long time and out of nowhere the girl left him and in 5 mos. was married and pregnant to someone else. When he told me this, this only thing I could think of was how I would never do that to him if I was in a relationship with him. He also told me he has been single for 2 years and that he doesn't know why because life can end at any sec. In this conversation , we basically were also talking about our views on society and all; we have the same views on everything really it looks like. Since that time, I have texted him every so often to say hey and whatever and I think we are going to continue to study together prob once a week at least and he also always comments on my fb posts.( by the way, within our convos, some of the stuff he says is in a flirtatious way but I cant tell if he is like that with just me or thats how he is in general) But all in all, I know without a doubt I am madly in love with him. I have been in past relationships and I have never felt like this in my life. I am going to europe for 6 weeks and he is also going to south america for 6 weeks in the spring so idk what to do but I will def be seeing him next semester in the fall so I'm scared I will ruin things. I want to tell him how I fell in love with him the second I saw him and how now since we've been talking he is all I think about ever. Im just afraid 1. he will think im a nut which im not, 2. he doesn't have feelings for me like that and 3. it will make things weird next semester. I also want to tell him because I would like for him to know how I feel before he were to get in a relationship with someone else or something not knowing how I feel. This immense feeling for him I have is eating away at me and I am so torn as to what to do because its affecting my life. If anyone has any suggestions as to what I should do please help me . Thank you.