Why am I still thinking of him?

So I got attached to a guy online, we're the same age, and we're pretty close now. He treats me well and clarifies when he leaves mid convo. In the process I fantasized and got attached to his perfect image which I had created in my mind; all I did was to wait for his replies and ignored my priorities. I came back to reality when I saw him and realized he's not exactly my type since appearance matters to me. Now I've uninstalled the app, its been almost 5 days and I've again started thinking of him. I don't like him, but I don't know why I find myself in situations where I'm like "oh how would he have reacted to this, or I'll tell him about this when I install the app, or I'll tell him the new experiences I had". I don't get it, if I'm not attracted to him why am I still thinking such stuff? What exactly am I feeling?

Why am I still thinking of him?
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