Help finding a song in a commercial?

I was watching the Titanic on TV last night and a commercial played a song that I really liked but I wasn't looking at the screen so I don't know what song it was. It talks about the months of the year (starting in January I think) and instead of just saying May the man says May I of May you or something. Then he says something about confessing his love on saying I love you in June and by July he wants to spent every season with you (his love) or he says every season is better with you. The tone is soft and light, possibly acoustic. Any help would be great!