Cliche I absolutely hate: the main character has two love interests who act oh so nice, so she/he can't choose who they like better. But life makes it easier for her/him by showing what an a--hole one of the love interests actually is, and the protagonist ends up with the other. And will you look at that, that person is the love of their life, but they just didn't realize until now.
What I would change: uhn a healthy relationship where the MC ends with someone they choose to, rather than with who was left? And, I dunno, an adult who makes choices because that's what life is about. And turning someone down, can be done in a gentle way if you are both mental-stable. Who knows, the not-love-of-their-life could end up being a friend.
Other cliche I just can't take is the: misundestandings among couples/friends/people that could be easily solved if they just talked to each other for like ten seconds. I'm looking at you rom-coms (and Shakespeare, God!, that man wrote the first rom-coms...).