Was I the issue

Me and my boyfriend of 6 months broke up the other day. Things went great for the first 3-4 months but after that I began to notice a drop in his communication which is fine and normal but after going nearly an entire day for a few days I asked him if there was any possible way for us to carve out time to bond with each other via calls or hobbies or even just a consistent text message thread without hours in between. He then responded with there was just no way that was possible and that he gets busy with adult shit to do. Which I found was odd because whenever I would have a period of being busy or just not available he would blow up saying I need to be better at communicating and that we should talk more which always left me extremely confused. Around our 5th month I took about a five day break from him before returning to try again this went on for a few weeks before I noticed nothing in his behavior changed and the thing is I’m not asking for hour long conversations or for him to have his phone in his hand 24/7 just some genuine conversations from time to time at any point of the day and he just wasn’t able to even attempt to try it. Always brushing it off as that’s just how things are… and I just don’t think it’s wrong for me to want more than literally one worded replies from my boyfriend who I’m trying to have a conversation with. He then texted me one night and said at this point we communicate like friends (I had cut off any sexual interaction due to not feeling emotionally content ) and with that he offered we just be friends which felt off consider this was once a person I was supposed to build a life with .