First you feel everything and you wonder why. Then you'll come up with all the reasons and justification and realise that this is too complicated. The essence of it all is still where it all began. 

Just that this time, you know more about what makes you unhappy too. 

So you avoid it all you can and end up avoiding everything. 

It's like I'm going into hiding because there's simply too many things I know I have to guard against.

If I start making sacrifices for you, it's because I love you enough. 

If I start putting down my guard when I'm with you, it's because I trust that you love me enough, not because I know that you love me. 

It's a cycle and that's why people who are ignorant are happier.