Do you have to overcome attachment if you want to truly love?

I would say, making your emotions solely dependent from your partner. As if they are the center of your life and, mostly unwillingly, hold much power over you. This sounds pretty harsh, but it takes many forms and is common in most relationships, I believe.

No. That means whatever affects him will affect you. That means you not living your life trully. And if he expects it then he is very selfish