I live in an area where I cannot find a farrier. So for the last 2 years I have been doing my trimming. He is a 14 year old arab that I am doing gentle trail riding once a day. Last year, the back of his frog and his heels seem to grow together. I left it alone because it seemed to make a nice foot. But now his bulbs of his feet are almost touching the ground. Are these 2 things related? And do I need to make a space between the frog and his heels? I know that I am doing something wrong. Please help.

I understand your plight, but I suggest that you go somewhere that you can at least spend some time with a good farrier so you will know exactly what you are trying to get out of trimming a foot. We will get people from time to time who come to school for only a week or so for the experience of it, without any desire for a diploma or business. You might try to find a reputable school that will do the same for your.
Often times, the horny frog will attach to the hoof wall in the heel area, and it can become quite thick and strong in some instances. Especially when the foot is steep and dry. I generally will trim the horny frog to its appropriate dimensions so that there is a definition in the central sulcus and commisures. A loop knife is really handy for that. As to his bulbs on the ground, I am not sure what you are describing. If his heels are actually crushed or that short, then you do have a problem requiring experienced help.