"The advice: Obama said it's important to ask yourself three questions, the first of which being where you find your significant other interesting
First, he asks: 'Is she someone you find interesting? You will spend more time with this person than anyone else for the rest of your life, and there is nothing more important than always wanting to hear what she has to say about things.'
Second, he asked: 'Does she make you laugh?'
And third, he said: 'I don't know if you want kids, but if you do, do you think she will be a good mom? Life is long,' Obama told him. 'These are things that really matter over the long term.'
When Pheiffer 
Obama himself has been pretty lucky in the relationship department, as he and Michelle still seem to be quite in love 29 years after they first laid eyes on each other.
The pair met in the summer of 1989, when Michelle (née Robinson) was assigned as Barack's mentor at the Chicago law firm Sidley Austin LLP. She was 25 and already working there, while he was 28 and had just graduated from Harvard, her alma mater." - President Obama's Marriage Advice: 3 Questions Everyone Should Ask Before Getting Married