No. It's not always true. People have a right to change their minds, you know?

We have gone through a full month without talking, it is just really hard because some days im very bipolor it seems like..One day i will be happy it's over, the next i am devistated. Is the statement true that they always come back? Anyone know?...

You guys were together for 2 years...so, unfortunately, 2 months isn't enough time to just move on. I do not think it helps that you're obviously still talking to him. So, why not take a few weeks to focus on yourself without any contact with him. Make him miss you while you figure out how to best heal yourself. Make a time limit before you will allow yourself contact and then reevaluate your plan at that point in time. No contact is REALLY hard, but you'll never get over it if you keep letting him in your life. After grieving & accepting the breakup, you have to get to a point where you make a decision to get over it. You're not there yet. It sounds like you haven't accepted the breakup yet. Start there. Then keep moving forward.