In reply to GingerBread22: Thanks everyone, for the thoughts/opinions/advice, it's really useful to hear from people that have had similar thoughts and feelings.
I'm studying a short Access to medicine course, soon to be at Medical School(location depends on offers) so with one thing or another, I am and will continue to be pretty busy- Being a medical student is a little unlike other courses, it takes a lot of extra time. Hence, I only really have the time to be half decent and one thing. I sort of already know that focusing on one thing would make for a happier and more fulfilling sporting/personal life, it's just the thought of cutting out a big part of my life (Even if it's not always making me happy)is difficult and a little daunting.
It's then the choice of which to cut out;
Climbing has been a huge part of my life, it's given me wonderful experiences, showed me brilliant places and I've met great people through it. However due to a few injuries, I find it more difficult to be decent. I've ruptured my ACL twice meaning I have a pretty rubbish knee, also climbing is a lot more dependent on the weather and conditions, travelling and partners.
Cycling, I do really enjoy- It started as a keep fit measure, but as with anything with me, it was apparent that I became pretty competitive. The good aspects are: It protects my rubbish knee, less dependent on location/weather/partners etc, it's easier to be competitive and measure improvements within yourself.
It makes sense to put climbing on the back burner, but that's easier said than done. It's just a big choice to make..
GB