You said:
"We were so in love",
No, YOU were in love,and you were no more "meaningful" to him than ANY of his previous g/fs you were just willing to put up with his crap a lot longer than the others.
Next you said:
" but then we lost ourselves in each other and that's why things happened the way they did!"
No, what happened was he did his thing, you did your thing and you both tried to make each other be something neither of you wanted to be is why things happened the way they happened.
You are not compatible and in case you have not figured it out yet,he is a player and uses girls like toilet paper, the same way he used YOU.
There is NOTHING..........................NOTHING stopping you from blocking his number and filing harassment charges if necessary.
You need to cut all contact and take time to grow up and mature, you sound like a 12 yr old girl hon in view of your thinking of this matter.
He doesn't "love you" he liked the sex and did not like being dumped and he wants to start it up again get some easy sex on the side and dump you to prove he has the upper hand it is a pride/ego thing on his part.Also in your state of mind,you'd go right back to him if he dumped the g/f and called you up crying, if nothing else there'd probably be "sympathy sex" until you got into your next argument.
He has been with THIS girl a yr so does that make her "meaningful"?