I could be. Not because of the actual passage of time, but the fact that it is running "old" technology.
I know it's a pain, and a monetary investment may be required... but you should seriously consider getting rid of XP.
Windows 7 is past end of life also, but it would still be a better option - but that would entail purchasing the new operating system.
You might consider installing a Linus distro on it. If you can handle using an android phone, you can handle Linux.
Another option is finding a "cheap" refurbished system with an upgraded OS already installed on it. In my part of the world, there are several businesses that take in "last generation" corporate computers...wipe them, install new operating systems, clean them up and sell them fairly cheaply.
Depending on what you do with this, an inexpensive tablet may also be a viable alternative. For example, I have a RCA Viking tablet that cost less than $80. I can take that with me when traveling, and use it to remotely access my computer back at my office, read emails, etc. - anywhere I have wifi. Obviously I couldn't run, say, AutoCad or something (well, actually I can through remote desktop, but it's not super convenient).
Obviously, each choice has it's own advantages and drawbacks, and only you can determine which is best for you, but continuing to run XP, I believe, is going to cause you more headaches down the road.