I'm not going to use the condom my girlfriend has.
Why would you not use the condom that she has?
I think she may have lied about getting the abortion. I am afraid of being trapped.
I can see how the situation is causing some confusion for you. It is bad to lie about using condoms, but you can always bring your own. You can let her know that you don't like the kind she has.
She can't be trusted anymore. I need to use my own. If I find out she lied about the abortion, she is done for.
It would be pretty messed up if she gave you some sort of faulty condom. In addition to that, using your own is without a doubt the safest bet. I think you should continue to use your own to protect yourself from having a kid until you are ready.