Hi there,
take your time contemplaining about the question wheter you would need everything that looks nice/appealing.
Dervice your joy from watching that bag, allow yourself to enjoy it. Truly enjoy the warm feelings you get when looking at it.
Then accept the fact that it is not responsible to buy it unless you have a strong need for its usecase (here: carrying stuff from A to B) and no better overall solution (another, more durable bag, perhaps a bigger one, or the one you already own).
I think the problem here is that marketing and consumerism is tempting us to want everything we like. We virtualy want to "buy those feelings" and that is scientifically proved impossible to achieve. It is the rosetta stone of modern marketing and one of the main reasons we are keep buying things we do not need. It is not the item we buy, it is the feelings we want to own, not seeing that at the moment we feel them, we already posses them for free.