The 24-year old is on loan with Championship leaders QPR until the end of the season and faces a weird scenario where his loan team could get promoted whilst his parent club are a chance of being relegated from the top flight.
But Miller says he will happily play for either club now that he has strung together some games after various injury worries.
"I've had a lot of injuries, which have stalled my career back at West Brom a little and I just needed something to inject a bit of confidence back in my game," he told skysports.com.
"It was nice to get the phone call from Neil Warnock and he is a great guy at a great club, so I couldn't really say no to be fair.
"West Brom have got a great squad there, with a new manager in place since I left, but I was happy there and I am happy here, so I'm not sure what will happen this summer.
"They could change divisions this summer, but hopefully West Brom can stay up and be joined by QPR next season.
"I'm not really thinking about my long-term future now because I'm just happy to be playing games again.
"I'm not putting any pressure on either club to make a decision and I will be happy to be playing at either club next season."