Here's why:
* "ily" is a common abbreviation for "I love you."
* "22" is a number, and doesn't make sense in this context.
Possible typos:
* "ily too": This would mean "I love you too".
* "ily 2": This could be a shortened way of saying "I love you too".
* "ily": This simply means "I love you."
Without more context, it's impossible to say for sure what the person intended.