it's time for an upgrade.
i had the same problem and upgraded my ~6year old 17in macbook pro to a 1 year old macbook pro (Apple MF843LLA MacBook Pro 13" Intel Core i7 3.1GHz 16GB 512GB SSD Laptop via amazon) and got a smaller, faster computer for ~$1500. i now see that's selling for more than $2k but you can still find late 2015 macbooks for under 1500 by searching.