Its going to be hard for a while because slowly slowly he trained you to put him centre and foremost in all your thoughts and actions, so that you were subconciously thinking 'how will he like it' before you did or said anything, and adjusted your behaviour to try to not upset him.
Its sadly a classic abusers tactic, and shows that you have been controlled. But it will change, although its a hard habit to break, especially as you have spent 5 years doing it. I also imagine that after you broke it off at 19, when you still had a bit of a grasp on 'normal' he probably reined back the obvious, but increased the more subtle abuse.
people seem to think that abuse is obvious, and why dont women leave. If it were so simple that you walked in and they punched you in the face or called you names in the first couple of weeks, then yes. But it isnt like that. and while they crank up the control they gradually chip away at your self confidence so that you look to them as the font of all wisdom. And they excell in isolating you or turning you aaway from those they see as a threat, who might be able to offer some support or perspective.
They are damaged people. They probably are playing out some serious bad issues from their past, which they may be open about to garner sympathy, but they are not doing the work, nor will ever do the work, to fix themselves - because fixing yourself means you have to take personal responsibility, and its always easier for these types to bully or blame other people.
take a look at the Freedom Programme - there is an online version and there are groups - or as others said 'why does he do that' by Lundy Bancroft. it should be essential reading for every woman.
And I second what people say - send one more text, telling him clearly that it is over and to stop messaging or calling or contacting your friends/family or that you will call the police as it is harrassment. You need to put it in writing so you have proof. Most of these guys are cowards, and if a bigger stronger force comes into play they will slink off into the undergrowth. And please do report it if he ignores you - at the moment he still thinks he is the big man, hence the abuse rather than the pleading - he doesnt believe you would call time, let alone the police, and they wont arrest him, so dont worry about that, but they will tell him to back off.