I need suggestions.

We've been together for 8 months. Our families were talking, we were talking about engagement and marriage. We were in a really good place. Just about a month ago, his family started pressurising him and questioning our relationship. He's been a very good son and doesn't like disappointing anyone. He has been extremely stressed about the whole situation and he is been acting out a few times, like saying things like he can't do this. Etc etc. I know he loves me a lot and its not like he is a kid. He is 35. He us a grown ass man. He can make his decisions but I think he is afraid to hurt people. Now just 5 days ago, he came to see me after a stupid argument. We went to eat, had a good time but there was a little friction. And suddenly he broke up with me and said he can't do this anymore. And the more I questioned him and said how can he just throw away something we have built, he got more aggressive about it and said he doesn't want to be with me anymore. And said some mean things. I feel he didn't mean them and just said them to push me away so that I'll be hurt and move on myself. But I'm not gonna give up on him as he is a great guy and I love him. He said he will turn off his phones and change his number and never see me again. He left after that and hasn't contacted me yet. He hasn't changed his phone number. I know you'll hate me for this, but I did contact him after 18 hours of silence and I sent some messages (quite some). I'm not proud of it. But I did. And I have been feeling like hollow as he is reading them but not responding. Why is he doing that? Does he not love me? How do I get him to see what he is doing is wrong? And I need to understand what he is thinking. I'm clueless right now. I'm clueless. Also I don't want to lose him by not contacting him and letting him think I've moved on but still I tried. So this happened on the 6th. And I contacted him on the 7th and 8th. But since the 9th I sent him one message and haven't contacted him yet. And it's almost the 12th now. It's really hard. Really hard. But I need to understand how is he having this much power and control to not text me back or say anything at all. Also, if he really wanted to end things, he could have just sent me a message or blocked me or anything when I said to him that I haven't told anyone about our fight, as I don't want to create a scene and I know you'll be back. You're just stressed, and I'm sorry if I added to it. So I'm gonna wait for you to come back. Take your time. That's what I said. He could have said, don't wait or anything. But he just read my message and nothing. No response. So is he going to come back or is he not? Now it's been almost 3 days of no contact. You think I should continue. I'm very confused. Please help.