I think the reason ted stop seeing laura was because it had to do with steve constantly bothering him all the time whenever he took laura out on a date steve would always be their to spy on them or tag along, he also had problems with eddie since he spreaded rumors about laura over school eddie would now be his enemy or maybe laura lost love interest in him and dumped him for another dude that goes to her school, i would have liked to see a episode where ted breaks up with laura and wants myra to stop seeing steve urkel.