I need a training program

[Sindyeli]

I need some help with how to train. I have the tendency to push myself when biking, and this week, it finally caught up with me where I felt worn out.
Here is how I got here:
I bought a new Ruby Elite in May, and started riding, at first about 12 mi. then 16, then increased a little more, and by mid-June I did 43 miles with a long hill at half-way. After that I increased my rides, always trying to do a long one a weekend day. This past Saturday I did a 70 mile supported ride, was tired at the end but still felt good so rode an easy 12 the next day. Monday off, Tuesday easy 24 miles. Wednesday, I woke up fried. I will mention that 2 weeks ago I had to take 2 days off as I felt I was catching a cold, but I beat it.
I just go riding and try to do harder hills on some days, longer rides on others, don't do intervals yet, and take days off once or twice a week. I also like to cross-train with intense Cathe aerobic routines (I love dancing and that's the closest I can get to it and burn cals) which include some weight. But I just don't have a plan and do all this a bit haphazardly, and it seems that I regularly get at this exhausted state.
So I'm hoping that I can get suggestions from those of you who know what they're doing. As an added note, I'm not into racing, but next year would like to ride 109 miles (which includes 1 super steep pass, Teton Pass, and another easier pass). I just like challenging myself. And I'm 43.
Thanks!