[xubuntu] Help with dual booting Xubuntu and Windows XP

I have a desktop with Windows XP Media Center Edition on it. I installed Xubuntu 14.04.03 on it a while back from a live CD, onto a separate partition. The installation worked and everything works fine with Xubuntu. The only problem is that when I boot up the computer, the grub loader does not appear; it just boots straight into Xubuntu. I still want to be able to boot into XP. I know XP is still there because when I view my partitions with GParted, the XP partition is still there, untouched. I ran the Linux Boot Repair tool, but it didn't solve the problem.

I have the boot log at this link: http://paste.ubuntu.com/14366754 so you knowledgable folk can look at it and see if there's any problems there. (the date on the boot log is old because my desktop has been like this for a while, I just haven't gotten around to posting about the problem until now lol). Anyone have anything else I can try to get things working properly? Any help at all is really appreciated.