I've missed my chance with him - what should I do?

I'm 21 years old and have never had any experience with men; I am told on a daily basis that I'm attractive/pretty, but I suffer from shyness, low self-esteem, and social anxiety, which has made it hard for me to become intimate with members of the opposite sex. In March I transferred to a university closer to my home due to ongoing mental illness that made it difficult for me to concentrate and succeed on my course. At this university I met someone who I have become very attracted to, despite the fact that he's not my type at all. For the first few weeks he seemed very interested in me, and would always make excuses to sit next to me in lectures. We started texting each other every day; when I was feeling sad or emotional he would comfort me; when I needed assistance with something he would help me. However, I began to become scared of the prospect of having a boyfriend, due to my lack of experience with men (he is the first real 'crush' that I've had) and severe depression, so I started to distance myself from him and act cold around him. I even went to the extent of telling him that I had a boyfriend so that he would leave me alone. Since then, through regular counselling sessions, my confidence and self esteem have improved, and I feel ready to have an intimate relationship with someone. However, the boy in question has completely cooled on me; he never tries to sit next to me anymore, never initiates texts with me, and the relationship seems to be entirely platonic from his side, to the extent that he confides in me about his love life, and how he still has feelings for his ex-girlfriend. Whereas before he would always make the effort to see me and talk to me, now he acts nonchalant, and we hardly ever converse with one another like we used to. I am completely infatuated with him, and seeing him almost every day, and believing that my attraction for him is unrequited, hurts me deeply. I severely regret distancing myself from him (especially because it must have confused and hurt him), and all I want is for him to start liking me in an intimate way again. I receive a lot of attention from other men, but I'm only interested in being with him. What do I do? I am incredibly shy, and don't think I could ever confess my feelings for him (especially if I'm rejected; seeing him every day would be incredibly hurtful and awkward), so do I just practice patience and hope that I get over him? I know that it's entirely my own fault that I missed my chance and he isn't attracted to me anymore, but I really want to make amends and start a relationship with him; is it even feasible now? TL;DR Shy and inexperienced with depression, met someone who I was very attracted to, yet stupidly distanced myself from him due to the fear of letting someone into my life intimately/sexually. I am now ready to have that type of relationship, but he has moved on whilst I remain extremely attracted to him. I've missed my chance, so what do I do?

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