Hi Lexicat,
Goodness, I can see where what he said would send one into a spin. It hit your vulnerable spot.
That "taking to college" and setting up house/dorm, and the "goodbye", is tough for any parent/child. Like NW said it's a time of stress, because it's such a monumental change and stepping stone (more like a gigantic leap!). Change is always stressful, even when it's something someone looks forward to, like a wedding, or a move that's wanted, or even getting ready for travel. Even positive stress is still "stress" which means heightened adrenaline, more easily aroused emotions, and less "filter control".
Your son would have been excited about going to college, but also stressed because it's a transition with unknowns: he has to make new friends, maybe have a room mate, worry about getting the classes/profs he wants, managing his finances, and his choices away from home. And while he knew what to expect in high school and at home, this is a whole new field of unknowns. Not to mention he has to now look after his own laundry, and perhaps some other chores. You on the other hand are experiencing a whole different set of challenges with him leaving home. So it's not really surprising that emotions collided into a bit of a storm. I think this is a pretty common occurrence.
What is special here, and speaks to the qualities of your son, and also the parents who raised him, is that he apologized. The kid is 18. I'm guessing that a lot of 18 year olds aren't in the habit of apologizing to a parent after a mistake, and a lot of parents would like to be in your shoes with a kid who did. I am a retired high school teacher. I spent a career working with teens and loved it, and I've seen all their emotions and behaviors. It's more typical than you think. I feel confident that if he apologized to you, you've got a keeper kid there, and that kid also has a keeper parent!
He owned it at 18. My mom is 89, and hasn't owned a bad behavior in her life. Just saying.
What I'm working towards here is a paradigm shift for you.
The words your mom said are probably words she was projecting onto you to dump her toxic feelings about herself as a mother. Just because she said them to you doesn't make it true.
He was likely just mad and feeling a lot of stress, especially since all of this was out of character.
Yes, this.
You say you "stepped all over him". So whatever this means and however it looked, be kind to yourself and remind yourself that you were coming from a place of love and caring and support. That is completely different from how your mother treated you. So you tried to do too much maybe? OK - it got a reaction, and now it sounds like you've both learned from that. He apologized to you, and you get to decide how to respond in turn.
This isn't a big change in your relationship, or the end. It's just a blip. My kids have finished college and are well into their careers. I've had my share of blips with our kids. What I can say is they are just that - blips.
Every relationship has ruptures at times, even the strongest relationships. It's how we manage the "repairs" that really matters. And these "repairs" can strengthen relationships and continue to build trust and actually make the relationship stronger. The important part is that the repair actually happen from both people.
The emotional response you had is understandable. It would have hit me exactly the same. Our nervous system was programed to think the worst by our mothers. But NW hit the nail on the head. Instead of feeling "she was right" (she wasn't!), take it as a sign that there is some unresolved "stuff" there for you to work on. I'm 63 and still working on my "stuff". My uBPD mother is 89 and lives 5 min from me and I have not gone NC, and I feel like I have quite a bit of "stuff" still, even though I've been working on it intensely for 5+ years. Like Zachira says, a uBPD mother is a lifelong sorrow, but this also means that we have more work to do on ourselves. Which is important, because if we let ourselves be hurt when others don't filter their own emotions or behaviors, we are perpetuating the cycle of our mother, and none of us wants to do that.
You've got this. I believe in you. And if you're 18 yr old son apologized, that's a testimony to his character, and yours as the parent who raised him. That's the paradigm shift. Also, it's how you both respond to to the blip that matters most, and it's less important that it happened.