Thinking about ending things

I’ve been with my fiancé 4 years and I’ve explained to him time and time again about my concerns and distrust. I posted a poll about this yesterday, but I didn’t tell the full story and something new came up today. First off, I feel like he’s completely overprotective of his phone. I can’t ever really touch it. If he needs the GPS, he uses my phone. If he needs to set an alarm, he uses my phone. If he needs to google something, he uses my phone. And his phone is in his hand 90% of the time, CHARGED. I feel like he does that just to keep me from his phone. He sleeps on top of his phone. There was only one time recently that he let me use his phone and that was because i was speaking to my mom and my phone died so I asked if I could use his and he goes “why?” And when I explained, he unlocked his phone, called my mom, and stood there with me while I spoke to her on speaker and took it back when I was done. And to clarify, I do not go looking for his phone. I do not try to break into it. This started because I found messages of him trying to have sex with this “eve” girl two months into our relationship (technically I broke up with him at the time so he said it doesn’t count and she was supposed to be a rebound but nothing happened). After that, he changed his password and I could rarely touch his phone. Recently I told him about my distrust, especially over social media which is where he reached out to “eve”, and he started leaving his phone around me but always on silent, notifications hidden, and locked. So even if he were cheating I wouldn’t be able to tell. Last night, I was up watching a movie on my phone and he was sleeping next to me. I was hearing messages coming into his phone. He has friends & family from another country that text him through WhatsApp and the notification sounds from WhatsApp and iMessage are completely different so I’m 100% sure the messages he was getting between midnight and 1am were through iMessage, but he said they were notifications from a sports app. Then I went to bed and that’s exactly what I dreamed about. That he was getting messages from women and when I told him (I always tell him my dreams so that’s nothing new), he immediately said “why you always talking about eve?”… I was like huh? I never said anything about eve.. I also told him to stop calling her that because that is not her name unless he wants me to go to work and give my male coworkers nicknames, it’s not cute. Also, yesterday, I was laying in bed NAKED, and I look over and he’s staring at some girls picture on Instagram. And I looked for a couple seconds until he noticed that I was looking at him and closed the whole app. I have talked to him so many times about being more open with his phone because all this secrecy is driving me crazy and nothing has really improved. I had to BEG him for MONTHS to remove the naked women on his Instagram. He gave me such a hard time about it. He stills follows women that he has had sex with. Now it’s to the point where I don’t have him on ANY social media. He has me blocked. He said that it caused a lot of problems in our relationship so he’d rather not have me following him. I’m about to call it quits.