Q: Should I ugrade my Macbook Pro

I have a 13.3 MacBook pro, 256GB with 2GB memory (mid-2009). I primarily use it to store my music (3000 songs) and pictures. I have been having some slow responses in start up and booting up iTunes, safari, photos, etc. I am close to capacity for my memory. Close enough to where I am unable to upgrade El Capitan. Most of the storage is from Other but I have made a serious dent in deleting pictures but it doesn't free any disc space up. I feel like even for an Apple that I have a pretty old MacBook. Just wondering if there were any other solutions other than buying a new MacBook. Also wondering if the fact that it is running slow is that my memory is used up or is it because it's an old MacBook.

Thank you