That's cute, but here's a funnier way to say it:

http://www.owensworld.com/jokes/men-women/boyfriend-50-upgra...

I prefer humor, but it's obviously not for everybody. Also theres a slightly different version of the one I posted above on this page, but I couldn't find a directly corresponding one for women's version. If you do please share- I'd like to forward it to my wife.