That was indeed what she was trying to say but honestly it was a very far reach, she felt lonely, but like, nobody tried to exclude her, those were her own personal feelings, she felt like she couldn't relate to other people's healthy family relationships, but sue never said smth like "once my friends found out I was different they excluded me and kicked me out of the friend group" girly was doing her own mental gymnastics and made herself feel lonely just cuz her parents are trash, just cuz you don't have a similar childhood doesn't mean you can't be friends??? And somehow, just cuz she personally felt lonely, she has the audacity to interfere in a perfectly happy relationship?? What if there was a misunderstanding? What if MC thought ML was cheating because of the dating profiles? She never even thought that far ahead because of her actions, and "the rode to hell is paved with good intentions", even if her reasoning did make sense, she had no business making their relationship all about her, she could've offered help or a piece of advice but that is it!
I think what she wanted to rely is that being abnormal or not one of the majority is hard and she does not want the seme experienced that, given that they live in a small village. Probably she is just insecure about life, she is still young she will understand it soon enough.