Startup vs Girlfriend
physcab: You're 25.  Realize that whatever you decide is a representation of this period in your life and does not necessarily reflect how your life is going to be lived until you die.Allow yourself to make mistakes and take chances.  If you go after the girl, maybe it won't lead to anything.  But it doesn't mean you've squandered your chances at success.  If you succeed (or fail) at your startup, it doesn't mean you're going to die alone.Think hard about your gut intuition.  Deep down inside you probably know what's right, and you just need a little encouragement.