Is it hard to think critically about something you love?

Not necessarily, you can look at the actions of a person you love and think critically of them. You can look at features or facets of anything and find criticism. But they say 'love is blind' for a reason. Although noting the critique, you often find that you don't care. Or that it's easier to overlook. Perhaps you find reasons (excuses) so wafer-thin if any one else applied them in an argument you'd rip them to shred. You love your SO for example, but hated the way he acted drunk the other night. With anyone else you'd be furious, disgusted, avoid them for a few days at least. With him it's all too likely that you'll fine other things to blame.

It can be hard to think critically about an emotional issue. In general, you use two types of running - emotional thinking and rational thinking. Emotional thinking is just that, using your emotions to base your opinions or decisions on. Rational thinking (or critical) thinking uses facts. It can be very hard to separate the two when something or someone you love is involved. But it can be done. You can write out your thoughts as a list and identify each one as emotional, critical/rational, or a mixture (a fact you emotionally agree with). Then cross out the emotional thoughts. Use what's left to start the decision process. This isn't to say it will be easy or quick, nor am I saying this is the only way to achieve a rational decision about an emotional topic. But it is a starting point.

In some ways I think it is hard to think critically about something you love. For example, new couples often find it very difficult to see fault in their partners. On the other hand I think that when people are truely in love, they do see the faults in the other person but they love those faults.

yes it is, that´s why sometimes we need an external point of view to clear ourselves and help us see thinghs we don´t

In my experience it is. When I love someone it is hard for me to separate my emotions from them and what their possible thoughts are. Pretending to be an outsider helps me be objective about the situation.

I think that we always see the best in the people that we care about greatly and tend to idolize them. It would greatly depend on your type of relationship. A mother would not jump to critical views about her child easily but a lover may find it easier to criticize a person they are in a relationship with.

That's a question that can cause a lot of debate, I feel. When you care passionately about something, it may be hard to see the negative sides of that thing you love. Though you feel this way, it is important to view the red flags with anything you love, mostly because ignoring the problems can lead to negative consequences.

It is tough to think critically about something or someone you love - your absolute devotion to the person or object as a whole blankets the entirety of your conscious thought and you view them with rose-tinted eyes because of the lens you usually see them with, one that distorts them into perfection.

It can be. Because our feelings get in the middle of our rational thinking sometimes. And while we should take our feelings always into consideration, it's important to know that even those that we love can hurt us, and it's not okay to oversee that.

No. Being able to criticize something we love is the indication that our love is not "blind". Blind devotion is usually unhealthy. Critical thinking equals logical thinking and love might defy all logic, but the things we love aren't certainly devoid of flaws. It sometimes helps to recognize those flaws. :)