Fake it til you make it, yo.

As bad as I've been, there's always been someone worse.

This is why I tend to stay off the blogs

I've separated your points by each mini paragraph.

1. Lapis Lazuli is correct, most people fake confidence until they start to truly become confident in themselves. Others look for something to be confident about or they reexamine their life to find a way to become more confident.

2. A person should never fear talking with another human being, as all they are is just another perspective. A good amount of people's issues they see in themselves is strictly internal (meaning it's just in their head or it's not something physically seen), thus there's no reason to fear for another person's thoughts. It's also important to realize that most people aren't nearly as cruel as they are made out to be, the majority of humans are good natured and thus aren't ones who are quick to judge another for any faults that one might have.

3. Everyone has problems that they face, each of them is unique. The important thing to realize is that when it comes to problems, it's not a measure of how life threatening a problem may seem, it's a matter of the person's perspective on their own problem. For some people, their problems might be not being able to grow enough food for their family before the approaching winter while another person's might be the inability to pay their  bills. One is more life threatening than the other but both may be of equal importance to that individual, it is the scale of their problems. If you truly feel like these people need some help, then by all means help them. Often, helping another human being is all that's needed to build up confidence in yourself. Also, when you're faced with a genuine problem you should never fear turning to others for help, whether it's friends, family, strangers or some paid worker, it isn't selfish. 

"How do you even cope?"

You find a solution to your problem or you accept it. Either way, you just move on from it. Essentially: If it's a problem you can solve, solve it and move on. If you can't then there's nothing you can do so move on.

Good luck,

~Soran