My bf of two years broke up with me out of no where and i’m concerned AIO?

Me and my boyfriend had been dating for two years when suddenly he broke up with me saying he wasn’t in love with me anymore, the day before he was talking about how he wants to have kids with me in the future and how much he loves me and wants to see me and then boom this out of nowhere, a week ago was the most in love he’s ever acted. All of my friends are friends with him too and all said that it was really worrying and odd, that he was acting off which was true, so I message him (we were still on speaking terms and he was acting like nothing happened) and I say are you genuinely okay cause everyone’s really worried about you and he messages me about how he’s not okay and theres something wrong and he’s feeling depressed and then later in the day tells me “goodnight name i’ll try to be better tomorrow” naturally I assume and hope theres a chance of us getting back together and there’s something wrong, during this time everyone who also is close with him is telling me he’s clearly still in love with me and I need to talk to him about it, so I keep trying to talk to him and find days that work to speak but nothing actually works until eventually 4 days after the initial break up and trying to find a day to talk in person I just text him what I had meant to say, he starts saying that the last 4 days I had treated him horribly and he could never regret this, and then sends a giant paragraph about how our dynamic was always just friendly (which was not true at all) and I was manipulating and bullying him by being worried about him because he was acting concerning and admitted something was wrong and made a very serious decision out of the blue and saying that him getting closer to me (making out with and cuddling with me 24/7) was like getting closer to a friend and that his extent of love for me was a high school relationship (im almost 18 and he is almost 17 we started dating at 15 and 14) after talking about kids the day before that, I’ve seen him every day for the last two years and was friends with him before that and I’ve never seen him act like this the way he said these things were extremely hostile and in a lashing out sense, to me this is extremely concerning and everyone agrees but the way he’s talking is making me feel like i’m insane for thinking that, i’m genuinely really worried about him especially because he admitted he was feeling depressed and overwhelmed by literally everything, I want to get an adult involved because I have a gut feeling something horrible is about to happen and he seems reckless but i’m worried about escalating the situation further and upsetting him and making him madder if despite how different he’s acting all of a sudden there’s nothing going on, I left a lot of details about other odd things he said to me out so this wasn’t so long so let me know if you need more, I just need a second unbiased honest opinion on this so I can know if my concern seems at all valid