Why me???

The day before my SO left me we layed in bed where he told me how much he was in love with me and wanted to marry me and he was never gonna leave me then we made love, next day i come home from working 10pm to 6am he isnt home i go to bed he shows up at 1pm and starts packing ley me say before about a month ago he left me and was seeing a girl he came back before everybody gets confused so im crying as he is packing he is saying he will be back he has to go make money in ft worth with a friend and he will be back in a few days im telling him no dont go cause this is the same friend where that girl is staying things take a turn i get a axe bottle thrown at my temple pushed into the bathroom sink i have a bruise a huge one on my back and my chin is bruised i get thrown on the bed and choked i dont see how things can change that quick i find out yesterday from the girl he is with her at some motel staying