cant talk to friends ab relationship arguments

so my partner (we are both 20 and female) won’t let me talk to my friends about arguments we have, which to a point is understandable so for example if it’s a deeply personal matter i obviously wouldn’t but the majority of our arguments are about little things which we blow out of proportion.

we were talking about this the other day and she said she wanted me to ask her before i speak to my friends about arguments and if she says not then wait until she says yes etc etc. the thing is i know she will most likely say no the majority of the time and i don’t want to have to ask permission for things like that. when i talk to my friends about it it’s usually for advice as i can’t often see where i went wrong of if i’m valid for how i’m feeling in an argument (i’m autistic). and also for venting because i have so much going on rn there’s only so much i can keep bottled.

anyways, she was telling me how she was talking to her therapist ab a recent argument and it’s good for her to vent etc. after she finished i said ab how tahts what i do w my friends n i need to vent she said it’s not the same etc etc then wouldn’t talk to me about the subject. i don’t have the opportunity for a therapist just to vent and get some steam out.
and as i cant ask my friends about this situation now i’m here on reddit so do u guys think i should be able to vent or get advice from friends or go by what my partner has said they want? i’m strugg to know how to feel

TL;DR i would like to talk to my friends ab arguments i have with my partner but she would like me to ask her first. But i know she will say no too often for my comfort. she isn’t willing to talk about this subject right now and will likely get angry if we do talk about it. i would like to talk to my friends ab it as i often cant tell if how i feel is normal or valid (i’m autistic) and i need to vent it out.