That's not necessarily true, in reality most people who bring you down, or at the very least try to, while they may not be strong enough on their own, they also most likely have their own issues that they need to solve on their own. Which sounds harsh, but unfortunately in the world, if we do not solve our own problems and we wait around for other people to help us when we drag them down, or when we expect people to pick us up after we drag them down is just idiotic. If someone drags you down, you need to step back and let them build themselves back up. Sadly in life we cannot fix everyone, and most times people have a very hard time fixing themselves making it so that people end up giving up a lot of themselves in order to help the people around us. You should stand strong in who you are and how you are made, you just should step back look at the world around you and analyze your situations before picking up the pieces of everything that's broken around you.