Im feeling like I might have to end this?

We've broken up twice already...actually twice in one week haha and we got back together a few days ago, again I find myself questioning the relationship, it just doesnt feel the same to me. I broke up with her initially because I am a musician and she stated to me that she doesnt want to be with someone who might be gone for a week or two at a time, I said that we arent at that point yet, however it could happen soon. She said thats not what she wants so I said that I understand and that I dont want to put her in a situation where she feels like she cant be happy and in an ideal situation. the second time we broke up, she went through my phone, right after having a conversation about trust, and she goes accusing me of texting this girl and hooking up with her, I explained to her that I have friends that are girls just as she has friends that are guys, she said sorry for going through my phone and said that she knows that was wrong and she apologizes for it, and that she does trust me. I explained that, that type of behaviour isnt going to be tolerated because if theres no trust theres no relationship. she agreed, well last night was the first time we hung out since getting back together and she seemed really on edge almost as if she hadnt gotten over me breaking up with her even though we agreed to move forward, she kept saying things to try and get a rise out of me such as "if we were to break up again, Id just laugh" and in my mind im thinking where did that come from? like we arent even talking about breaking up and its just kind of random. I asked her where did that come from? lol and she said I dunno I guess Im just kind of scarred from you breaking up with me twice, I told her look I cant change what happened in the past all I can tell you is that Im ready to move forward, and I feel like she is holding some feelings from the breakup and I feel like thats understandable. Anyways later that night we were about to have sex and she stops out of nowhere and looks depressed "I ask her whats on your mind?" she said is there something I need to know? I said yea its cold as hell in here haha as the windows were down in her car lol and she says no something else and I say like what she say did you have sex with anyone else when we werent together and I said naw, why do you say that? and she said because your not kissing me and holding me, its like you dont want to be here, I told her I dont really understand why you feel like that but I do care about you and I am here. so then we had sex for like an hour and she says I need to go because I have to pack, and so I say alright ill catch you later, she says really your not even gonna say have a good trip or ill miss you or be safe or anything, and I say, "what?" and she says "**** it whatever you dont even care about me" and at that point I said where did that come from? and she said "whatever" and I say alright Ill catch you later , and as shes leaving, she says great way to show me you care why dont you go fuckkkkkk someone else? and speeds of, in my mind im like really? where did that come from? lol it feels like Im giving her opportunities to prove that she trusts me and she keeps doing things to push me further away I do want to move forward and I do care about her but I dont understand these random outbursts. and it makes it difficult to be with someone who is so quick to say things like that