I met her a month ago. I was very attracted to her from the first sight. Somehow I could hang out with her several times, I don't know if I could consider as several dates. I cooked for her for dinner once, we watched movies together twice, and also had coffee and lunch together sometimes. We went out together and went back together. I met her quite often. Only 2 of us in every time. As talking with her, it turned out she already has a boyfriend, he is in Japan, not here in the UK (we are both oversea students). After she told me she has a boyfriend (not on any purpose, just in a normal conversation), we still hung out.We had eye contact a lot, every time I looked at her eyes, she looked back, without saying a word, we looked into each other's eyes for minutes. I could even feel her looking at me even when I turned away, I know because many times I looked for her, she were already looking at me. I thought she has feeling for me, like I do. I've felt for her. The day she came back to Japan, I gave her a letter, confessed everything with the hope she would feel the same. But she told me she is still in love with her boyfriend (they fight a lot and he is a type of guy who likes controlling his girlfriend, she said he's getting better so she wants to keep this relationship) and she just wants to be my friend. So I was wrong, but still don't understand. Why did she look at me like that? Why did she say yes every time I asked her out? The way she looked at me, was not the way someone looks at his/her friend. What was in her mind? Now she's already been in Japan for 2 weeks, after the letter, we haven't talked. I really want to, but I know I shouldn't. I still have feeling for her, it's killing me every day. She will come back to the U.K in few days, but before she comes back, I will have already left to my home country. We're not gonna see each other again until September.
Please tell me what went wrong, please explain to me what happened. I don't understand. I miss her.