I really want extensions too, and was going to crochet them too, but heard it's a pain. You said you weave them? How?
With my last set of dreads I weaved my boyfriends old dreads into them for length...and also just to see if I could. It was fun to pretend to have long dreads for a few days. However, I did a shitty job sewing them on and they started to fall off and fishing line was hangin out every which way...it was pretty ridiculous. Plus just the thought of having somebody elses old hair attached to my head started to freak me out after awhile, so I took them out. Brings back funny memories