I agree with Shiho san's opinion. In another words, we can call it「片思い」("unrequited love")

「みたい」 is colloquial style for 「のようだ」 The sentence sounds like she has pain of love now. So it would be; " It seems that I'm in love with someone who will never love me" If it's written as 「私のことを好きになってくれない人を、いつも好きになるみたい」 then it would be; "It seems that I always fall for someone who doesn’t love me back" So if you ask me which is correct, I would say the first one but not exactly the same as Japanese sentence.

The second