Jisho

少女だいすきです。Shōjo daisukidesu. (I) greatly like girl(s).

https://jisho.org/search/shoujo :

少女 (shōjo)
1. little girl; maiden; young lady; female usually between 7 and 18 years old​
2. female between 17 and 20 years old (ritsuryo period)​

To whoever wrote this: keep practicing your handwriting.

actually that handwriting is quite solid. like any other language, when a normal japanese write a note (for school, personal use....), it's often quite hard to read.
Though in this case, the 女 is wrong in the first 2 strokes. xD

The fact that 女 is wrong gives it away that it's not a native, before you get to any other part of it.

The first character, 少 , was also written incorrectly. "Hard to read" characters and characters that have been written incorrectly are two different issues. A wrong stroke is akin to misspelling a word in English.

Morally, that sentence really does not sound right.