Then turn right back around and say he loves me and needs me. This rollercoaster is crazy.
My companion tells me he wants nothing to do with me
Yes, I agree with your view about the "rollercoaster" sounding "crazy"!Concentrate on knowing what your reasons are for staying with this guy, given the broad facts that you state.What are you gaining from being together and are these gains outweighing how you feel when your companion says the opposite of what he just told you?Also, examine yourself for any fears of being alone.Very often, people stay in detrimental relationships because of a fear that being alone will feel worse.It may, initially feel this way after a breakup.This is from change itself.Eventually, stability and peace of mind return, and being alone with oneself is preferred to being taken on an emotional rollercoaster by a partner.