听说爱你一下会上瘾哇还好我自制力不强
[tīng shuō ài nĭ yī xià huì shàng yĭn wā hái hăo wŏ zì zhì lì bù qiáng]
It means 'I heard that falling in love with you once will be addictive; luckily my self-control isn't too strong'. It humorously implies both attraction and lack of resistance toward someone's allure.