The athlete opened up about his marriage to the American film producer in a new interview with Attitude magazine, saying they have 'tough times and struggles'.
'Our relationship is far from perfect. We have really tough times and struggles. For example we went long distance for a very, very, long time: he was in LA, I was living in London. We would spend sometimes five weeks apart,' he told the publication.
'And it's something that was really, really tough and we've had to make massive and dramatic changes in our lives in order to be able to live together and see each other all the time. So it's not all plain sailing,' he added.
The Olympic gold medallist married Dustin, who's 20 years his senior, in May this year, after becoming engaged to Dustin in 2015.
Responding to the criticism they sometimes face due to their age gap, Tom said it doesn't really bother them.
Tom and Dustin got married earlier this year
'I don't care if someone says something negative about us. Why would I? That's their business. I don't think there's any one way to be is an LGBTQ person,' he said.
'I don't want to be heteronormative in every way either; gay people are unique and different. That's fabulous.'
'We wanted to get married and that's who we are. But don't be like us, go do your thing, be you, be wild, be as LGBTQ with all of the diversity you can think of, do your thing. I am not about blending in. My heroes are not about blending in.'
The pair married in 6th May this year, with Tom taking to Instagram at the time to confirm the lovely news.
Alongside a picture of their big day, he wrote: 'On 6th May 2017, I married the love of my life, @dlanceblack ❤️ We shared the day with 120 of our closest friends and family, from Texarkana to Plymouth! Thank you to everyone who made this weekend the most special weekend of our lives!'