Does it mean he likes you if he remembers your birthday and is the first one to wish you a happy birthday?

My crush was the first person to wish me a happy birthday, just after midnight, he sent me a message on Facebook.

Also, I had university lectures that day, so the whole day he was watching me in class from the back of the room, everyone was coming up to me and hugging me, giving me their wishes...he waited til they had all gone and I was alone...he came up to me and said happy brithday, smiled at me.

I asked him how he was and he seemed really nice and pleasant, he walked off and we didn't chat for very long. It really meant a lot to me that he made the effort to come and speak to me and give me his wishes :).
Does it mean he likes you if he remembers your birthday and is the first one to wish you a happy birthday?
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