原谅我不善言辞但爱你好真
[yuán liàng wŏ bù shàn yán cí dàn ài nĭ hăo zhēn]
Translated to 'Forgive me for being poor at words, but loving you sincerely'. This user likely acknowledges that he/she might not be very good at saying beautiful things, yet the love and feelings he/she has toward another person is sincere and genuine. It can indicate humility or vulnerability.