Any of you with good relationship advice...I NEED your advice! Kinda long, but THANKS! We're in college btw...

Ok, I am going to tell you as much as I can, and plz help me figure him out. We slowly became good friends over the course of 2yrs. He told his friends we talked a lot, and they figured I liked him. Ever since that day, he began somewhat flirting w/ me. His gf broke up w/ him 3 months ago after a 3yr relationship. The last few months of his relationship, him and I grew extremely close & I began to think he liked me, but we both kept it platonic. Day after his breakup, my friend against my choice asked him if he liked me. He paused, said as a friend, then asked if he gave the wrong impression, then kept asking if I was mad. 1 month ped, and I didn't really talk to him. I needed to get over him. After that month, we're back in school, and it starts. He is flirting like a mad man. He texts me 10x a day, calls me randomly and asks very personal questions, stares a LOT, blushes around me. I thought for sure he liked me. Then the contact reduced a bit after a month. Now, he still texts