It's ok about the late reply..
Don't worry about it.
Anyways..I am very glad you are learning new things..
and that you like your english teacher..
Mine is pretty fun too.

답장이 늦은건 괜찮아.

신경쓸거 없어.

아무튼... 새로운걸 배우고 있다니 다행이다..

영어선생님이 맘에 든다는것도...

나도 (영어선생/수업)도 꽤 재미있어.