HeLP ? i really don't kknow what to do !?

I'm in love with this guy , but my mom can' stand him , because he smoke & dress like a street gangster ! nobody where i live like him just because his smoke like really w.tf last night we got into a argument because i ask him to stop smoking & he said that won't change anything he also believe i like his bother because i been talking to his bother about whats going on , today he left his house in the morning around 7 & is already 3 and he hasnt return home what should i do ! ( he think i like his bother just cus we talk )