Should I be offended he hasn’t gone down on me?

So I’ve been consistently having sex with this guy for a year; it’s mutually an unofficial thing bc we are both super busy and live really different lives— anyways we met through my friend who was actually seeing him first- they met up a few times and she kept bragging to me about how hot and great he was; and how great he was at giving head / eating her out. Eventually they tried to have sex but he couldn’t get it up / keep it up and then they stopped talking. He met me briefly once when they were still talking and ended up adding me on social media etc etc so we started talking and seeing each other later.

Anyways we ended up having sex and it’s a lot of fun and we’ve been doing it for a year and I’ve sucked his dick multiple times but...he hasn’t gone down on me ONCE, never asked me about it or anything- he only asks my to go down on him all the time and always talks about how much he loves blow jobs. It only hit my recently that he hasn’t gone down on me (in my defense he’s been studying abroad for the past 6 months and only came back / started having sex again recently) he hasn’t gone down on me or ever brought it up at all...should I bring it up? Should I feel some type of way? Does this mean he doesn’t want to go down on me or something?? Why did he do it the first time he hung out with my friend but has yet to do with me...? It kind of makes me feel insecure in a way? Even though I know they ended bc he couldn’t get hard for her so I probably shouldn’t feel insecure because he doesn’t have that problem with me but...once I realized this I haven’t been able to stop thinking about it and worrying! Am I overreacting ? (I’m 21 hes 23)