What does it mean if a guy says "Omg my heart is racing so fast... I don't wanna hurt your feelings."

I have messaged him "Hey! How are you???? I miss you. And then he said Omg my heart is racing so fast.... I don't wanna hurt your feelings. And then I asked him what does he mean by that... He said never mind.... Anyway I really like him a lot. He claims to like me too. So why didn't he not tell me what he meant by that. And whenever I ask him he keeps telling me to ignore what he have said. And I have asked if he is ok and he said "yeah".

But why would his heart race and All the tell me he doesn't wanna hurt my feelings. Hurt my feelings for what??? Esp if he claims to like me too. I'm 21 and he's 23.

We would text almost everyday on this message app. Even tho I would be the mostly one texting him. Lol I don't get why he said all that. I asked if I have annoyed him or something from texting him everyday. He said "no"