I'm missing something here. You plan to fly into Canada, join up with your girlfriend, then fly with her to California. She will then return to Canada alone a few weeks later. Have I got it right?
First, if she can calm her nerves enough to return to Canada alone, this suggests that she can fly to California alone, and save you an expensive trip.
Second, if you plan to return to California with her, why not just get a round trip ticket? Round-trips tickets are a lot less expensive than two one-way tickets.
But if you really want to buy a one-way ticket into Canada (e.g. you're not sure of the return date), and you want to play it safe at the border, buy a one-way fully-refundable ticket from Canada back to the USA. Then, once in Canada, cash in the refundable ticket.
Finally, once you know your return date, buy a a cheap one-way (fixed date) ticket.
I will be actually coming back with her to Canada with a roundtrip.
So basically she'll be buying me a one way ticket (maybe depends on what we decided after making our minds up.)
Stay in Canada for about a week or two.
Then fly back together on two roundtrips; Canada to LA for about 2-3 weeks or whatever we decided as well.
Then I'll stay there for about another 2-3 weeks and then come back by myself.
If you have two weeks, and she hates flying - drive.
LA to somewhere like Vancouver is 24 hours of "on the road" driving.
I did that trip (and more) over four days; PCH TO SF, I5 to Seattle then the 99. As long as the weather is good, the trip is fine.
Don't really have two weeks but we've talked about the whole driving thing but she would rather fly even though she's scared.
Typically the return ticket is better evidence.
Also, some airlines will not sell you a one way ticket to Canada unless you are a PR or a Citizen of Canada.
There are no guarantees with immigration.
Hmm would calling an airline be helpful?
I'm sorry for asking all these question I just wanna make sure before I do it and not just jump the gun and then not get into Canada and such. I mean I'm not planning on living there until I LEGALLY can. But I know it takes awhile to do so.

Thanks for all your answers and such! I appreciate it. (We do.)
