blissfully ignorant

When one's ignorance is used as either a coping mechanism or distraction from pain or simply reality, in which they are in a state of bliss far away from their problems.

"Michael seems to be a lot more blissfully ignorant these days, are we sure he isn't going through something rough?"

" I prefer being blissfully ignorant I don't want to think about the darkness in my life right now, it's too confusing"