Meaning of 私のことを好きにならない人が好きみたい


The sentence

> 私のことを好きにならない人が好きみたい

means "I like someone who doesn't like me back", but someone said to me that
it means "I try liking someone who doesn't like me".

Which is correct?




Your friend's translation is incorrect, I'm afraid. The みたい here means "(It)
looks like~~" "(It) seems like~~", not "try doing~~". (It's the auxiliary
(助動詞) 「みたい(だ)」. I guess your friend is confusing it with 「te-form + みたい」,
which consists of the subsidiary verb (補助動詞) 「みる」 + the auxiliary 「たい」,
meaning "I want to try doing~~".)

「私のことを好きにならない人が好き（だ/です）」 (without みたい) would mean "I like someone who
doesn't/won't like me back" or "I like the people who don't/won't like me
back."

With the ～みたい, your sentence means:

> 私のことを好きにならない人が好き **みたい** 。  
>  " _It looks like_ I (tend to) like someone who doesn't/won't like me back."  
>  "I _seem to_ like someone who doesn't/won't like me back."  
>  or " _I seem_ to like the people who don't/won't like me back."

