想念只让自己苦了自己爱上你是我情非得已
[xiăng niàn zhĭ ràng zì jĭ kŭ le zì jĭ ài shàng nĭ shì wŏ qíng fēi dé yĭ]
This conveys longing and pain due to loving someone which the speaker can't help despite their suffering because of it; essentially 'missing you just makes me sad, but I couldn’t help falling in love with you'.