hiya Ads
some sound advice already, but I thought I'd add my two pennath
As a lot of others have already said, riding with the same people all the time means it's difficult to see improvement as they may also be getting fitter too. When I first moved to the peak last March I hadn't done any exercise for about 3 months with all of the moving house and job senario and I went out on a night ride with Mrs NBT, India, Ros etc - it was the Hayfield ride, and I was in my lowest gear pretty much as soon as we started to climb up the side of the quarry. I was at the back for most of the ride, and felt really, slow and crap and my arse hurt. ... So I know how you feel.
As you might have noticed, I'm quite competitive and knew that I could be faster and more comfortable. I sorted out my saddle pain - playing around with different saddles and padded shorts, and I started riding home from work about 3 times a week (and catch the train in). It's only 8miles, with a couple of biggish hills. It took me 45mins the first time, and it hurt. I aimed to be able to ride it without using granny at all. I now ride it in and back in about 35mns on a single speed. It still hurts, but you just get more tolerant of it as you know the more you tolerate it the easier it'll get. So I would say, be patient (that's really important, you can't be super fit overnight), and keep riding at a good pace. But most importantly, make sure that you enjoy yourself.
The other thing is food whilst you're out riding. Topping up your glycogen regularly throughout the ride - fig rolls, nutrigrain bars etc, and make sure that you drink enough. If you want your body to keep going it needs fuel and hydration. I went out with the boys the other week for 4 hours, I only ate 3 fig rolls, and drank 1.5l of water. I was wasted by the end of the ride. Normally 4h with the boys doesn't trash me that much....it was lack of fuel and dehydration - so I need to take my own advice there.
....oh and one more thing, that does actually help is clipless pedals. You actually pedal in circles, and use the pull as well as the push. It makes a big difference when climbing and I feel happier when decending clipped in. But you may not be comfortable with that. I know that India has problems with her knees and so doesn't clip in and it can take a while to get the hang of it.
Hope that helps. Hopefully see you next week for the Hayfield ride