I think the best way to get back an ex is to count the last day you tried to contact him and from there not reach out to him for at least 4 weeks. During this time you need to work on yourself, find happiness through you and not him, try something new, go at least on one date, see friends. Basically you want to improve yourself and you want to mentally move on from your ex. When you feel good and happy about yourself, stop reaching out to him and don’t obsess over him, things will suddenly change. He will wonder what made you stop reaching out. And after those 4 weeks if he doesn’t reach out then you can send a simple and not complicated text. Just something like “Hey I was just thinking about checking in on you, how are you?” if he doesn’t respond for a long time, don’t freak out and send him another text or call him. You’ll come off as obsessed and that’s not what you want. You want to seem like you don’t really care, that whether he responds or not doesn’t matter to you because if he doesn’t your life moves on. If you come off with this vibe it’ll increase your chances.
Let’s say he does respond, Keep the conversation light, and suggest you guys grab a coffee or a drink someday. If he agrees to it don’t start talking about getting back together, just talk as friends and let HIM bring up your relationship eventually (if you see him another time after that).

Basically you need to move on to get him back. That’s the only way, you’re too easy right now. No guy wants to be with a girl who constantly tries to get his attention. You need to disappear from his life and work on your own to eventually prove to him that you’ve changed and that your happy with or without him in your life. When he realizes that he can actually lose you that’s when a guy puts all the effort back in! Hope this makes sense

As I understood that your ex is not emotionally mature enough.. His actions are childish and he is communicating ambiguity through his actions..
I think also he decided to ghost you .. and the best thing you can do to a ghost is :  Ignoring them and don't give them the reaction they need. If he valued the realtionship that you both had, he would be at least communicative with you .. but telling his best friend that he s ignoring you ?!! Seriously !! No thank you .. Next!

hi gal, I was in your shoes before. and here's an article that really helped me when I was struggling at the bottom.
I hope it could give you some enlightenment and inspiration like it helped me 

http://back.ly/Ay4dc

wish you have a great future with your loved one.

interested, will you meet me? cutt.ly/3sxm5bW

Tired of meaningless news? Have fun with girls in your town cutt.ly/3sxm5bW or online cutt.ly/AsxQ9bv

Hey, I'm not gonna lie, this is a difficult situation. Maybe he has met someone that turned him against you because the only facts are for your ex-boyfriend the pictures he received. However, if he really cared about you, he should have gone through the full story and should have asked you the real facts. Don't mind him anymore and try to start fresh with someone new.