Dont do it m8!!
I had the same thing with my ex wanting me back saying she loves me.I know it will just end up being the same as it was before!!
I still love her but i want to change and move on in my life,she says she does 2.But i know she will be on best behaviour and mean it,but sooner rather than later she will fall back 2 old habits and so will i and ill end up miserable and going nowhere again.
Unless you want to return to your life 16months ago with her,move on or stay friends nothing more.Its for the best even tho it sucks and is hard trust