I (27f) told a guy friend(30m) that my self image oscillates and they told me maybe I had BPD which upset me
I (27f) was having a chat with a guy (30m) I care deeply about something personal and explaining that my self image oscillates quite often and that it sucks to experience. We've known each other for about 4 years and it's been quite flirty and now he's possibly moving nearer me we've been having conversations about getting to know each other in a deeper way.
Anyways, after opening about this he sent me some symptoms for BPD and said 'why didn't I make this connection sooner, I love psychology.' I promptly told him that this upset me, that aside from this I present no other symptoms for the disorder and that he's not a psychologist so he really shouldn't go around telling people things like this. Then I said to him I needed some space and I walked away from the conversation. He sent a brief apology some time later.
Anyways, this morning I called to let him know we were good and that I was just calling to let him know that and he spent some time trying to explain his 'perspective' and why he did that and how he wasn't expecting me to take it personally because 'I'm like him and don't get offended by mental health diagnoses.' I said to him that wasn't really the point of my being upset and that I feel he overstepped a boundary and that he wasn't a psychologist so he didn't really need to weigh in like that.
After some time I told him the conversation was becoming unproductive and I cut things short. He again messaged to say he felt like he was always apologising to me or overstepping. I said to him that using words like always don't really push us forward in any meaningful way and that while he can say he was well-intentioned that doesn't matter more than his actions and how that comes across.
Am I doing something wrong here? Sometimes I feel like I really am always at odds with a partner or potential partner. I don't know how to handle conversations like this. Is it that I should just expect an apology and have it end there or do I need to listen to other person's perspective even if I feel like it's bs?
TLDR: A guy I'm talking to said he thought I might have BPD and this upset me because I feel like people shouldn't go around diagnosing stuff like that and we got into a tiff where I explained he should diagnose people. I'm unsure about if I've handled this correctly or if I need to listen to his perspective more because he claims it was well intentioned.