I know this is bad but fuck him

This is on anon because I dont want to get traced. I've seen stories on how bf's leave condoms in cars and y'all say to soak the condoms in some spice and shit and well guess what we don't use fucking condoms and I found a half empty box under his car seat. So I decided to take this upon myself to fucking show him not to mess with me. I got some spices and poked a few tiny holes in the corner of the packet and put them back. A week later he needs to go 'help his mum' a couple hours later I get a text from him that he is in the er because he got 'bit on the penis' and something is wrong. Mother fucker fucking cheated on me. I'm not going to tell him what I did I'm just going to leave his fucking ass