Is there a limit to how many times you can travel to Canada from the US in a 6month period or year?

My boyfriend came to visit me in Canada twice before in the last 4 months, he only stayed for like 2 weeks each since he had to deal with some stuff in the states. Hes going to be coming back again for a the whole month of July for summer, then its back to school sadly. So my question is since hes been here twice in the last 4 months, could he come again in July? Hes from the US is that helps.

NO

There is no limit on how many times he can legally cross the border. Many people have friends and family that live on both sides and they cross daily.

Yes, he may come back to Canada, he is here as a visitor. My husband and I did that for a year back and forth every month, there should be no probs.

I dont see why not.... as long and he is not doing anything wrong he should be good to go in and out as he want