I am inlove with him..Should I just move on or let go?

I fell inlove with my brothers friend, and he is in the army. I am only 18 and he is 20. I just want to know what you all would think about the situation? So feel free to say anything you want. It was my decision to keep it from my brother since I had no intentions on taking things serious with this guy in the first place but he changed my perspective. He's name is Will, we dated for a week around dec- jan and I'm for sure I know we took it really fast. He was only here for a week since he had to go back to he's base in another state.We both did'nt think we would see each other again not untill after 9 months, but after a month before he would get deployed he came back for 4 days and I only hungout with him once.. it just got complicated in a way. Our first week together was good we did stuffs like going to the mall, going out to eat, watch movies etc. So at that time I was for sure I wasn't no bootycall to him. But when he came back for 4 days everything kind of changed, he said he would call me the next day to hangout, he did'nt instead i would get a text from him apologizing he coud'nt ofcourse i said its ok. My brother and my brother's friendsss know EVERYTHING about me, who i slept with and many more.. the reason they know that is I used to see them everyday, and sometimes drink with them but with my brother. Will is NOT one of my brothers friends that I hungout with, he is best friends with my brother's friends. And I never really talked to him till we dated. I know he's probably heard stuffs about me from my brothers friends. Im dumb for sleeping with him too soon and expect him to feel the same way to me but I just felt everything we rushed things. We planned on writing letters once he get's deployed in afganistan, he did told me once he's back we would start all over, and we had some plans also. I was so eager to know where I stand to him so the day he was leaving to go back to he's base, I told him in person that i'm feeling alot more to him, and he did'nt say anything. Just because I said I dont expect you to feel the same. Good or bad atleast I wanted an answer to calm me down. I guess I was so upset there was no answer after the silence so I decided to give him a closure. He then told me it's not like im not coming back, then i said some things i did'nt want to tell him, like it's so annoying how he expects me to be always just there(Kinda regret i said that because he seemed upset after i told him that) Ofcourse after the closure there was no communication no text nothing. Then the day of hes deployment I sent him a text wishing him goodluck and there was no reply back. So my question is should I write him a letter and continue to get my hopes up,(if he doesnt write back i would feel extra stupid) or just move on.?!