"I really enjoyed my time with her" is the normal expression of this. The more flowery literary phrase uses "immensely" metaphorically because the word "immense" technically applies to a "size". The phrase appears rather pretentious or autocratic, but the word "immensely" would be used at the end of the sentence.
Example sentence - He changed his major to meteorology and enjoyed it immensely.
They thought it to be true, and enjoyed the performances of the strolling minstrels who sang the story immensely, particularly as the Greeks were portrayed as winning.
When I was in school, I was in an enrichment program and I enjoyed it immensely. The only down side might be that most friends probably aren't in the class with you. I encourage you to join1
It means exactly what it says. I often add it after my thanks to someone I have been spending time with, usually for the first time. I mean "Thank you for a great afternoon/evening/weekend. I really loved (enjoyed immensely) the time we spent together." Unfortunately perhaps this is not the answer you are hoping for, because to me, at least, it does not mean "I love YOU."
Immensely means greatly
Depends immensely on where you are (Norway is long) and time of year.
A monkey is immensely annoying.
Well he liked to travel, he enjoyed that.....
Up until it was discovered in the New World, tobacco, and smoking it was unknown in Europe. Europeans enjoyed this new product immensely and a huge market for it developed.
I was immensely energized this morning!
If you mean something like "immensely grateful" then immensely would probably be "extremadamente" which actually means extremely.
I was immensely proud of his work.