Blindsided after a 1 1/2 year

Around a month ago i (F23) got blindsided with a breakup, and I dont know what to do with myself. Sorry it might be a long one, but im so confused.

My now ex (M22) was a bit distant the last month, and when i tried to communicate this he would get annoyed and assure me nothing was wrong and that i was simply just overthinking.

Background on our relationship, we were together for 1 year oficially, but we were seeing each other for half a year before we got together, and back then i even had to give him an ultimatum in may 2025 because i didnt want a situationship. He said he was scared and not sure if he was ready; but he chose me, and ever since then everything was going so perfecttt well until june of 2026.

My ex left to live in Paris from march to may, but he was supposed to stay until december, just to learn french and this is something which is normal to do in our sabbatical years in DK. And it didnt go as expected, he didnt do well french wise, social wise, and general mental wise it didnt go to his liking, and since he is such a proud person he didnt want to admit it, and just began saying he wanted to spend some time alone and grow as a person. I knew he was miserable, and he spend all day talking to me on the phone, 8 hours almost everyday, and since I knew he was unwell i tried to be there for him always, even though it was exhausting talking to someone up till 8 hours a day. And I kind of think he was having a crisis, because he had dreamt about Paris for a while now, and it didnt live up to his expectations, and he didnt want to talk about it.

He then came home mid may to surprise me, because “he missed me so much, and he couldnt stand france anymore”, he was very frustrated with the whole Paris thing, but he didnt say it directly, but i know this whole thing was very draining for him, and i think he might have had a life crisis, that he was trying to ignore? He was embarrassed.
But then he came home, and everything was okay for a week and a half, and then i just felt like he was a bit distant and off.
I tried to communicate but he always assured me nothing was wrong, that he just got back and also wanted to see his friends and family. I understood completely, but this continued for the whole month of june. The person i would spend a couple of days with everyday, would only spend one evening of the week with me. I kept asking like “hey babe, is everything okay”, and he would tell me that everything is fine, that i am overthinking and he would tell me if anything was wrong, and at the same time i noticed he would get more and more annoyed with me, even though i did nothing.

Fast forward beginning of july, i confronted him directly, and i told him that i have been so anxious for over a month now, and that he keeps telling me nothing is wrong, but that i can clearly feel in my guts that something is off, and then he admits that the reason why he has been distant, is because he was considering breaking up with me the last couple of weeks. This shook me to the core, and he just told me that since coming back from Paris, he felt like he was losing feelings and that it just became worse and worse, and then began talking about us not being compatible, but his explanations didnt make any sense.
So it all just changed to randomly, before france everything was well, in france it was also good since i was his safespace and we were taking all the time, but it was as if i was not as important to him after he came back, like as if he didnt need me anymore and it was so weird.
I feel betrayed, because i spend so much time and energy the three months while he was in Paris, and then when he came back to his real life again, i was just not as interesting, i dont understand? He couldnt himself give me a reason to why he felt like this, and i genuinely believe him because he seemed confused himself. And after this he was not sure if he wanted to break up, and asked for a couple of days to get his mind straight. Then three days after, we met, and he broke up with me, and kept thanking me for being the girlfriend i was, and wanted to continue as friends, and i told him i didnt want anything to do with him after this, and told him i was so dissapointed in him and that I am so shocked, and mad that he didnt even want to try to fix it.
And now im here one month post breakup, i feel helpless and never expected this from him at all, we have been no contact ever since.