my bf's mom said she's 'uncomfortable' with me and he just... told me that

okay so I (30s F) have been dating my bf for 7 months and we're genuinely at the point where we're talking about marriage. so let me walk you through how we got here.

first time we were supposed to meet his parents: they wanted to see me after finding out we were dating (like 3 months in). bf said come around 5pm, they'll pop out for a sec before their plans. so I showed up at 1pm, hung around his neighborhood, did some local festival stuff. then at 4pm, an HOUR early, they text saying they're heading out now, can we meet? I was at a cafe 30 minutes away. meeting cancelled. okay fine whatever.

second time: I had a huge exam that day. after the exam I dragged myself to his neighborhood to wait for him so we could head to my place together. while I'm on my way he calls and goes "hey my parents want me to drive them home (20 min away), is it okay if you just sit in the backseat?" and I was literally in post-exam goblin mode. unwashed. exhausted. I said no, I look like a mess, please just tell them nicely I'll meet them another time. so I waited, he dropped them off, came back, we went home. fine.

so FINALLY. the actual meeting. his cousin's wedding in September. I go. I meet the parents properly. it's a little awkward but honestly? they were so nice. said a lot of kind things. when we said bye his mom was like "next time you're in the neighborhood let's grab coffee and chat!" I genuinely left feeling good about it.

the next day I asked my bf through him how his mom felt about me.

first words out of his mouth: "mom said she's uncomfortable with you."

I'm sorry WHAT.

he explained it as: she liked my first impression and vibe, but since it was the first time it felt awkward, so if I just showed up in the neighborhood she might not be able to meet me. and apparently he just... sat there and listened to his mom say that. said nothing.

the whole ending of the wedding was so warm and good??? and now THIS?? I was genuinely blindsided.

and my bf just casually relayed all this to me like it was nothing. told me it's probably just because she hasn't done this before (meeting a girlfriend he's serious about), told me not to worry about it.

not to worry about it.

bro I am looking at MARRIAGE with this man. his mom saying she won't see me if I show up is not a "don't worry about it" situation. and he just sat there when she said it. didn't push back. didn't say anything to smooth it over. just let it land and then handed it to me like a grenade.

if it were reversed I would have found a way to say it to BOTH sides so neither person felt bad. that's just. basic?

so is he genuinely bad at being the middle person here or am I being too sensitive. I really can't figure this out on my own so I'm asking you all. thanks for reading this whole thing lol