Why did my crush continue to be nice and friendly after I told him I like him?

A couple of weeks ago I was at a library with my best friend who is also my crush. He was helping me out with a situation I'm going through with family. We were on a deep topic and the conversation flowed into me telling him I like him. This took a lot for me to admit because I didn't want to risk losing him as a friend. Also he is in a relationship with someone and that's why it took me a long time to tell him. I don't want to hurt anyone but he had to know the truth. He listened to everything I respectfully had to say and he was understanding. I recently started dating someone and he knows but I like my best friend a lot more. What suprises me is that he continued to treat me like a friend after I told him. He didn't say whether or not he likes me too and nothing became awkward between us. He became a little friendlier towards me, that was the only difference. What does this mean? I haven't seen him since but will see him again soon. We have been texting a little but that is all. What does him not saying anything about it mean and him being friendlier towards me after telling him I like him mean?
Why did my crush continue to be nice and friendly after I told him I like him?
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