Should I break up immediately if I see no long-term future?

My question to you is, can you imagine your life without her? It's good to think with both your head and your heart in a relationship, but it sounds like you need to go with your heart on this one. If you spend too much time yzing the future, you can't enjoy the present. You have so much time to grow together, I'd hate to see you break something good off based on something you only think might happen. Love is hard to find...enjoy what you have now. I'd hate to think how you'd feel if you were to look back and always wonder if she was the one.