Sorry if it this doesn't make sense..

What do you when the person you've been trying to have a baby for 3 years, you realize your not in love with him anymore and you know you found your solemate somewhere else... but then your 10 days late on your period.. if I'm not pregnant do I stay because It would break his heart or do I leave to be happy. And if I am pregnant do I stay and be unhappy with him.. #help 😦