Any tips to catch a cheater?

My bf and I have been together for a little over a year but as of recent I have this nagging feeling that he’s cheating. Just some typical inconsistencies with his stories and behavior.

We don’t live together but I’d rather not waste anymore time I want to confirm my suspicions without having to ask him so I can up and leave with no explanation lol

So any tips?

And before y’all start with your “oh your toxic” or “you need therapy” just save it babe this is my way of doing things, y’all can do your own thing I’m just asking for the girlies that have tips.

Edit:

Thanks for the girls who had positive things to say and weren’t trying to make me feel bad. This is actually my first relationship since my bd who created all these trust issues for me… and I love this guy with all my heart I just don’t want to look like a fool. Did that for a long time with my bd and I don’t want to do it again or go through everything I had to go through dealing with self image issues, trust issues, etc..

some of y’all need to learn not to beat down on other women who are trying to learn when it’s time to leave or who don’t know how. Speaks poorly of your character.