Loving my imaginary pets as though they're real.?

I have really begun to love my digital pets as though they're real. I feel like if I neglect them they will actually be sad or hurt, which sometimes makes me anxious and scared :'(
I know this isn't NORMAL but, should I talk with my therapist about this? :/
I should add that it's not disrupting my life in other ways, mostly playing with them just makes me happy. :3 Also it's gotten me outside more (I'm disabled & need to rest frequently), walking, as my 3ds has a pedometer lol. :)

I don't see anything wrong with what you describe.
Personally I have been through many phases where I obsess over something only for it to ultimately wear off before I find some other online game to obsess over.
From what you describe its not all negative and if it helps you by getting out then all the more reason to keep at it.

It happens to everyone.
I used to talk to my shampoo bottles. ^u^
If you have a therapist that you see regularly, it wouldn't hurt to mention it.
:3