Luke has been homeless for three years. He ended up on the streets after losing both of his parents.
He has found a father figure in fellow rough sleeper, Shaun. The two spend most of their days together, and Luke says he "loves him to bits".
Addiction and homelessness don't always go hand-in-hand, but drugs are something we have heard a lot about during our filming.
Luke and Shaun are both recovering addicts and have been prescribed a substance called methadone to help them stay off heroin.
Luke and Shaun are trapped in a depressing cycle of homelessness and addiction.
Luke and Shaun shared their stories with ITV Cymru Wales as part of our week-long special coverage on homelessness.
Watch more of Luke and Shaun's story:
Read some of the other stories featured here:
See more of ITV Cymru Wales' special coverage on homelessness here.