(Cover) - EN Showbiz - Seal says his marriage is a success because Heidi Klum is his best friend.

The singer tied the knot with the German supermodel on a beach in Mexico in 2005 and they raise four children together. Seal is more in love with Heidi than ever and the pair renew their vows each year in front of family and friends. The star insists it is important to appreciate your partner and he never misses an opportunity to tell Heidi how he feels about her.

Im married and in love with my best friend, Seal said in an interview with New! magazine. We go through everything together. We go through the same sh*t that other couples go through; we disagree and have very few low points but we have a lot of high points because we just realise how lucky we are to have found each other.

Seal says he always puts his family before work and has turned down a host of opportunities involving his career to spend time with Heidi. He accepts a successful marriage requires some effort, but says it should still be fun.

The pair do their best to never spend more than two weeks apart and plan romantic breaks alone if they havent seen each other for a while. They recently travelled to Italy with their kids and then visited the UK on their own to keep the spark alive in their marriage.

We gave the children to Grandma and Grandpa while Heidi and I went to London for a week of misbehaving! 47-year-old Seal explained. We stayed in bed all day and then went out at night. It was amazing and so important to have that time together. (C) Cover Media