My ex and my friend are dating and it’s all my fault!

Me and my ex broke up 2 years ago and I felt like I’ve moved on.We recently became friends again and He needed a girlfriend so i put him on with one of my friends who needed a boyfriend.I really regret it because last night we were on the phone and it bought back so many memories and I regained my liking for him overnight like an idiot.Today all 3 of us were on a video call and i could see the way he was looking at her it hurt me to see that he looked at her the same way he used to look at me and tells her the same things he used to tell me.He even told me “Her smile is amazing.” And she just texts me so much about how much she likes him,which makes me sick to my stomach.I don’t know if I want to cry or scream because I’ve never felt this type of jealousy before in my entire life and I don’t want this jealousy to turn into hatred towards my friend or him.I just wish I could go back and rewind to where I told him I had a friend who can be his girlfriend.It also feels like my heart is aching anytime i think of them together. - thank you for reading this if you can leave some advice that would be great.