I understand your first point. However, the true question is if the OP actually loves the person he's with, or if instead he is just using her. First case, work on the relationship, second case stop.

Concerning the second point, it depends on many things. Probably if you had already a CS background and are pursuing a PhD in CS, your situation could be different. But if you pursued a PhD in the humanities (including economics) there are a lot of things you need to learn to be useful in tech.