Am I Overreacting for still thinking about my ex

Okay so I(19) had broken up with a guy(18) 4 months ago and he was all nice, we had a great time, then one day he texts me that he can’t talk to me for a few days since his parents had found out about us. I reassured him that everything will be okay and to take all the time he needs to talk to him family after which I could have my mum talk to his dad on phone as my mum and sisters already knew about us and were quite supportive. Fast forward to 2 days later he gave me his dad’s number and mum called him to talk about us and our future and THAT IS WHEN I GOT TO KNOW SINCE CHILDHOOD HIS AND HIS COUSIN’S PARENTS HAD DECIDED TO HAVE THEM MARRIED IN FUTURE. I was furious but did not react on it as I was madly in love so his dad talked to mum and told her I have no problem with their rls but let’s give them 2 years till then he shall move to UK for studies and she can also complete her studies BUT during this time they may not talk. Mum said okay just to pacify him and later asked me to continue our rls but alas the guy neither stood up for us and blamed his family for being too strict and might even throw him out and blamed my mum for going along with his dad’s decision not saying anything. This went on for a week and during that time I used to text him a lot but rarely got a reply but when he did reply he used to get mad at me for texting as his mum might see it plus at the same time used to send me videos of him crying lol alright so a week later we broke up and it was messy, I used to cry to my mum all night asking for him, then I think I got over him but every day I still think about him, I still have his pictures in my phone and still hope he might come back as the same thing happened with my parents when they got married (due to family pressure dad stopped talking to mum for 6 months and then came back to fight with his family for mom and marry her).

Update: My mum introduced a guy to me for arranged marriage, I was reluctant at first but this was my opportunity to move on so I started talking to him and guess what, he is the sweetest human being. When I get sick he stays up whole night and on call for about 7-8 hours just listening to me breath. He lives in another country and I might move there too in 4-5 months and he has said he will marry me no matter what, he can fight the world for me and he treats my family as his own too💕