Should I get over him or not? :/?

Last year this boy (let's call him Bob) and I were in one class together. We were freshmen. So we teased each other and everyone thought that we would look so cute together. Bob's friends told me that he liked me. I secretly liked him too. I told my best friend about him and she didn't even know who he was. On Facebook she added him and started inboxing him asking if he still liked me in the summer and he said yeah. She asked him again September and he said no I'm over her. This year we are obviously in sophmore year. And we don't have any classes together and it is really awkward when we pass each other in the hall. We don't even talk or say hi anymore. I still really liked him and his friends still told me he secretly still liked me too. And now there is a really popular girl who likes him and they say they are 'married'. They are always in the hall together and they are hugging each other all the time. And today he put her arm around her. Supposedly they are actually going out. There is this casual dance this week and I think he might go with her. I can't go because I have a tournament this weekend. I really liked him and he liked me too but it just didn't go anywhere because he admitted it in the summer and he didn't have a phone or anything. I did a test in November and see if he added my sister but didn't add me on Facebook and he added her! I was waiting for him to add me but he never did. So i just added him last week and he accepted. I really liked him... i really did but now it's all gone. Do you think that I should just get over him? I haven't liked anyone for this long and it is certainly not going anywhere :/