我姓李却难入你心里
[wŏ xìng lĭ què nán rù nĭ xīn lĭ]
It means 'I have the surname Li, yet find it hard to get into your heart.' The person uses their own last name 'Li' as an alliteration in a self-deprecating manner, expressing a sentiment about someone they love or like who doesn't feel the same towards them.