Get a passport like others are saying.

But I'll also add looking into NEXUS. It's the US/Canada trusted traveler program and is awesome. $50 for 5 years gets you TSA Pre, Global Entry, and NEXUS which is Canada's version of both. You skip airport security lines in the US and Canada, and lines at US and Canada customs at airports and border bridges. There's even a NEXUS only bridge in Buffalo. You save a lot of time and you get TSA Pre and Global Entry both for cheaper than the cost of one of them.

Only caveat? It requires an interview, and they are only done at the border. So you might have to schedule an appointment and run up to Buffalo. Also not sure what the current wait-list is after COVID really screwed up the process. And you need your passport first, so get that.