exgirlfriend,
None of the above is good and you did not cause nor deserve any of it. these are things that addicts and alcoholics do while using. yes this can be dangerous and very hurtful. the addict can be very persuasive and cunning just like the disease. The hard part is the addict typically believes the things he/she is saying and thinking while using there for it can be very sincere, however it is not at all. The key thing here is to take care of yourself and do what you can to separate yourself from this situation. if pete seeks some real help and you will know if he does, then and only then would I recomend further communication. Yes I do know how hard this can be, however you will find this is much better and easier on your once you are able to remove yourself long enough to see this too. Be safe and be strong.
JT