What do you think about lying to my girlfriends?
What makes you want to lie to your girlfriends?
People are so mean to me because I lied.
Lying to someone is almost never the correct answer, especially when it's your partner. You said yourself that people are mean to you because you lied. That right there is a good reason not to lie.
I don't know. Lying seems like it makes me life so much easier.
Lying is not a good thing. It is bad to lie to people you trust and who trust you. Lying only makes people more upset when they end up learning the truth.