Am I weak, if I choose not to stand up for myself and just walk away?

I think it's weak to argue or walk away from a situation. If you argue with a weak mind.. you become weak. However, if you do not stand up for yourself and you walk away. You may be perceived as it's a sign of low self esteem.

Sometimes walking away is the strongest choice - not every situation/attack requires a response. For example, many anti-bullying instructions suggest ignoring the bullying at first as the most efficient strategy since the bully is first and foremost hungry for a reaction. But if bullying is affecting a person's life in a noticeable way, is continuous and causes distress, then standing up for oneself is often recommended. As well as seeking out help, which is also one of the strongest choices since it can be very hard to ask for help.

It depends on the situation. If you believe walking away would be you being the bigger person, you should. Especially if it's something immature. If anything, if the problem continues, let a parent, teacher or someone you trust know.

Not necessarily. Ignorance can be really strong. Bullies for example might stop because it becomes boring.

That can be a debated question. I was always told that walking away from a problem can make you a bigger person, but if you don't stand up for yourself sometimes-it can turn out badly. I would never say you are weak. You are strong, you can do it.

Sometimes not standing up for yourself doesn't make you weak it's just a smart move taken by you. Ignoring others acts and words is the smartest way in handling the situation at times because at the end your smile, happiness and the way you do not show any fear of them would be a sign of strength to them and your strength would be there fear at the end. But if it's excess of bullying and torturing then grow the strength inside you to stand up for yourself. It might be hard but remember it's your life not others to rule so live it and face it because you got only one chance. Never think that you can't or why didn't you because no matter what anyone can be a master they just have to find the strength within them to achieve it.