Not sure what to be embarrassed about there. Emotions just are. Developing a certain feeling towards someone isn't something you directly control. I see it as the opposite of embarrassing that you were self-aware enough to recognize what was happening and walked away, instead of feeding it or doing something that would be worthy of embarrassment.
I'll share much worse for you.
I had zero healthy friendships in real life for several years of my childhood... from about ages 8 to 15. My family got internet when I was 13. I quickly became really good friends with a girl who I'd chat with daily on IRC for the next 3 years. Considering the previous several years, I valued this intensely. When I was 16, my family went on a long trip (about a day's travel), and she lived not too far from the destination and not much out of the way. So we stayed at a hotel near her place so I could spend an evening with her on the way there, and dropped by briefly on the way back. Around this same time, I'd been developing deeper feelings for her.
I was awkward as hell. Didn't do anything inappropriate. Just really, really fucking awkward. I was also so emotionally worked up by the whole thing that I think I only got 3 hours of sleep one night the whole week. I just wasn't in a good place at that point in my life.
I started talking about how I wanted to come see her again when we would hang out online, and she rather quickly disappeared after that. Suddenly avoided all contact without warning. It totally crushed me. I knew I was awkward, but didn't understand for a long time just how bad. I wasn't... horribly intrusive or like scary-level stalker-like. But over the next few months, I did send her a few overly emotional e-mails, called her repeatedly one day until she yelled at me to leave her alone, and asked her real life friends (who also hung out on IRC with me and continued to do so after she left) if they could convince her to talk to me. It took me a couple years to fully move on.
*shrug*
Today I understand how unhealthy that was, and have cultivated a much stronger emotional independence. Everyone's got their own issues and ways they need to grow.