I've recently been offered an opportunity for promotion on a temporary basis but it would mean going against a respected colleague at interview. It's only for a few months until the person who has been recruited for the job starts. I think I'd feel bad if I got it (about my colleague) and worse if I don't! My boss is really pushing me to go for it but I don't particularly want the extra responsibility that comes with the job and really enjoy my current role. Basically it's just not the right move for me at the moment.
How would it look to my employer if I refuse to go for this? I do want promotion in the next few years but just not at the moment. I'm worried I'll get passed over next time around or seen as flakey and non ambitious!
Help/advice would be very welcome.