MacBook is slow(er). Can I replace the processor?

Hello,

My macbook pro (late 2013) has served its time with me. I has started to run slower. Not distractingly slow but noticeably. Is there a way to replace the processor? or can anything be replaced that could make it run faster? or would you just recommend riding this out and getting a new one? I still have over 80 GB of storage left as sometimes that can slow it down when it gets too full. I included some info below about the mac if that helps. Thank you

 Model Name: MacBook Pro

 Model Identifier: MacBookPro11,1

 Processor Name: Dual-Core Intel Core i5

Processor Speed: 2.6 GHz

Memory: 8GB