I dont know how to feel.

my partner and I are constantly breaking up and it is taking a toll on my mental and spiritual balance. I am forever thinking that he is chdeationg or lying because of the past and a little of the present. there are a few people that I question his relationship with and it doesnt seem that he cares abut how I feel. I love him but I dont want to lose myself in the process. I sdee great process with him but then he slides back down to where we started. I feel like I want to snap some days and then there are times I want to just give up. everytime I express my feelings about thesed things, i hear he will do better and it aleays only lasts for so long. It seems like i meet the same type of people and starting to question what is wrong with me?