Out of Toxic but kinda sad

Week 1: So I met this guy on Tinder and to days after on March 22 we went on a date, 3 days straight we went on dates on the 3rd date he brought a bag for me which I thought was cute and on the Saturday of that week. The day of the party I got drunk and he accused me of flirting with his cousin while I was dancing with his which should have been a read flag , cause I was not. Then he kept complaining how annoying it was that he could not get me on my phone when he calls.

Week 2: He bought me an Iphone on Tuesday and while everyone was Omgishing over it I kind of knew what that meant, and I wasn’t excited as I should have been but I really needed a new phone. He brought me out etc. Whenever my friend who is a girl who is bi called etc he thought it was weird or our relationship was weird.

Week 3: The Monday I went over his place and I guess I was acting weird because he was acting withdrawn etc asked him what’s wrong he said nothing, I felt uncomfortable asked him to bring me home. Anyways eventually I found out that his ex resurfaced saying she was pregnant from week 2 of us dating ( he told me she sent a megative test weeks ago) however the interesting bit is I asked him the last time he had sex from week 1 and he said it was In February but with a friend and he never seen his ex in 2 months. I was more thrown off about the lie and this guy told me that technically he didn’t lie and that she was a friend but did my ass leave nope. Oh forgot to mention after he told me that his ex was pregnant I read the messages but didn’t respond because I was talking to my friend processing stuff, he blocked me on whatsapp and instagram. We met up on the Tuesday and he basically was saying he doesn’t know why I am acting like it’s his fault etc the conversation got heated and while that was happening my male friend called and then he made that a thing. He then went to drop me home and was erratic shouting etc then he told me he wants the phone back. Anyways we made up and he brought me to a fancy restaurant where we could talk and see where it goes safe to say we argued the entire dinner. Then we made up on the drive home. We were supposed to meet up Saturday and he rescheduled and I thought about it that he did that because I only messaged good morning and didn’t say anything else for the rest of the day. Then messaged him that “I think we need to take a break, as I feel every time we take one step forward we take couple of steps back. Let’s take this time to reevaluate stuff” he didn’t respond so I called yesterday and set several text which he read. Idk what is wrong with me, my ex said I should block him and never speak to him again as it sounds like if I went back things could get abusive. But why does it feel wrong that I left? I know I sound stupid but at this point I think I have to be the problem.