What does 968 mean in a text message?

When writing a message the numbers 4 5683 968 translate to "I love you". Taken from the alphabet where as the key number 2 is abc, 3=def, so on and so forth.

4 = I

5 = L

6 = O

8 = V

3 = E

9 = Y

6 = O

8 = U