Was this controlling?

I’ve been with my boyfriend for over 2 1/2 years. We’re very much in love and we’ll be getting engaged hopefully in a few months. I’m 22 and he’s 28. About 3 years ago before I met my boyfriend, I hooked up with a guy a handful of times. After a while this guy started texting me asking to hook up again and I repeatedly told him that I can’t because I have a boyfriend. This guy is very relentless and texts me every few days wanting to meet up with me and “hang out”

About a year ago I sent hook up guy pictures that I shouldn’t have sent while I was in a relationship. I told my boyfriend and he forgave me. My boyfriend asked me to block him but I just never did cause I didn’t really see anything wrong with getting texts from hook up guy since I rarely responded to him. My bf started asking a lot of questions about my convos with hook up guy and said he was hurt that I didn’t block the guy. The reason he’s scared is bc his ex cheated on him with a “friend.”

I offered to show him the texts and he read through them and he texted the guy back from my phone saying who he was and said “Bro please don’t talk to my girl anymore. Ya’ll are no longer friends.” He said he didn’t want anyone to take me from him because he’s scared we might get in an argument one day and I’d talk to the guy for comfort and I might end up cheating or he’d end up losing me. Do you think him sending the text is controlling?