The 'Deadpool' actor and 'Gossip Girl' star married in 2012 and share four kidsCredit: Blake Lively/InstagramBlake Lively and Ryan Reynolds have been madly in love for 15 years — and they have the photos to prove it!The actors, who met on the set of 2011's Green Lantern, began dating later that year and wed in September 2012. Since then, they have welcomed four children: James, born in 2014; Inez, born in 2016; Betty, born in 2019; and Olin, bor…