Memory continually being eaten up since I had SQL Server 2014 SSMS installed
SQL Server is set to start by default on system start. SSMS is just your management studio and not the SQL Server engine itself. 
You can set SQL Server service (services.msc) to manual, and set the maximum memory it can allocate lower if that is a concern to you.

Important: 
SSMS &lt;> SQLServer.exe