Yes, you should replace the slave.
And clutch disc, self-adjusting pressure plate, throwout bearing and pilot bearing
Kit is about $200
You can get regular pressure plate kits for less money, and they will work, BUT....clutch will not disengage unless pedal is all the way down to floor + an inch, lol, this will only last about 1,000 miles as the clutch disc wears a bit, then pedal will disengage clutch at a higher and higher point until the disc is worn out.
Self-adjusting pressure plate keeps disengagement point in the middle of pedal travel for the life of the disc.
It can be hard to bleed, but most are not.
Self adjusting aren't as hard.
It is a good days work to disconnect and lower transmission, R&R clutch parts and then line up and reassemble.