Good friend doesn't realize

I am an 18 year old male. I am in college now, 3 hours away from where I grew up my whole life. I have been friends with this girl for almost my whole life. When I was in junior high school she wasn't in my school so I didn't talk to her that much, but when I got to high school I became even better friends with her and used to talk to her a few hours every day. Maybe I didn't realize it then, but I never wanted her as a girlfriend, the thought never even crossed my mind. I only thought of her as my best friend. Now that I am in college, I still talk to her every day. About 2 weeks ago, I started having this strange feeling like I really wanted her as a girlfriend. I hinted to her that I really liked her and wanted her as a girlfriend, but I don't think she understood what I meant. For some reason, about a week ago, she wanted to know what my roommates in college were like, and I accidentally gave her the screen name of one of my roommates. Since then, she told me they have been having long conversations, but she won't tell me what they talk about, and that she really likes him a lot, and wants to meet him. I think what i'm feeling is jealosy, but I don't understand how she can't realize I love her. Not only has this created tension between me and her,but also between my roommate and me. Honestly, I am stuck, I do not want to outright tell her I love her, because I have this feeling she will just laugh it off. Please help, I do not know what to do anymore. Tweet