Using a comb in curly hair is a big no no. Just doesn't work.
Only detangle with a wide tooth comb while the hair is wet and full of conditioner. Otherwise you just cause breakage, tangles, etc.

You're not losing hair because it's long. You just notice it more because it makes a bigger mess.

If you want to cut your hair, cut it.

Live Curly Live Free - Home is a great starting point.