He is definitely controlling, possessive, jealous and insecure.
PP’s have said everything else which is wrong about this relationship so I won’t go over old ground.
I will say though, at 27 (almost 28) I met a man 2 years younger than me and was with him for 2.5 years, living with him for the last 6 months. He had all the traits mentioned in my first sentence. I’d been engaged before but hadn’t had that many serious relationships before meeting him so I was a bit naive there. I recall speaking to my best friend abut him a few months after we’d been dating and she told me straight that he was controlling, jealous etc, it wouldn’t get better, it’d get worse and to reconsider being with him. I stupidly thought his bad qualities would be fine and I could deal with them and told her so. It also wasn’t that bad then, at the start.
I had 2 platonic male best friends who unsurprisingly disliked this man! My ex SO would ring me on my mobile if I’d been out after work and if I got in eg before/after midnight, to “check I’d got home safely”, I knew after the first call he was checking I was out/in, who I was with etc, by the call convo tone and his questions. He tried to control what I wore too. He confused me by giving me lavish presents (mostly jewellery), compliments, sending me flowers, paying a lot for things etc (we also went dutch too). I recall I got so nervous and anxious I got eczema on the backs of my knees which was anxiety related and my SO used to say it looked disgusting. As soon as the relationship ended the eczema disappeared!
After 2.5 years and not a great relationship and also him cheating on me (found out after we broke up), I ended it and was on Prozac and in therapy due to his actions. One of my male best friends I spoke to after it ended could see my confidence was at rock bottom and I wasn’t “me”. He asked me after I’d confided in him, why I hadn’t told him how my now ex-SO had behaved towards me, and I shamefully admitted to my friend that I was too embarrassed and ashamed to admit my SO was treating me so badly and I was letting him do this.
My SO did tell me (not an excuse) that his DF had continually cheated on his DM whilst they were married and they had a very acrimonious divorce which I/he believes made him so jealous etc.
Anyway OP, please, please, rethink getting married! If I could turn back the clock and not have dated my ex SO back then I really wish I could.