I've been using the same sword that I have since Level 1-2, I'm now Level 7.

When will I need to get a new one? It does 13 damage.

when u find a better one, thats when you will need a new one.

You can use whatever you like, some are interested in stats (the damage a weapon can do) others not so much and go for what they think looks nice!

Im still using the same Imperial sword I got at the beginning of the game at level 12. I just cant find a better sword, and I dont want to use axes or maces.

If you like it, use it, it not find another :/