Nasty posts on here.
If posters care for the well being and outcomes for OP and her son, making her feel ashamed like some pound land slapper is not going to achieve that aim .
OP, you have needs as an adult. You are allowed to have those and seek fulfillment. The absolute best thing you can do here is therefore separate any boyfriend and the home. You keep them out the home, you keep them at a distance for now.
Your boyfriends will care ONLY about accessing sex and whatever things they get from you on a personal level. They don't care about your son or your relationship with him, no matter what guff they give you about this.
This is human nature and we are not much beyond animals in this respect. Your son will ALWAYS be competition and THREAT to your male partners. Always. Please hear this. He instinctively knows this. 🙏
You are entitled to a life. But you will create chaos bringing these two elements together. Keep your private life private for now. It won't be for long.
You don't have to put up with this behavior. I have experienced great trauma, death of a parent in terrible circumstance, mum boyfriend arseholes. I made a choice in the end not to be an abusive fucker.
The ND aspect I've brought up is important. Because, for many, there are significant disadvantages in emotional regulation, organisation of mind and life, thinking style, need for autonomy and challenges receiving direction are typical for many ND boys this age.
It's very relevant in the context of what you describe.
(I'm not interested in any posts replying to me with ' my Autistic son is an angel' ' stop blaming ND on everything '.... anyone with a brain and experience knows this is very relevant and if applicable needs a slightly different approach in case it might be relevant. Only OP knows the answer to this)
Offering help and support with very specific examples are important ( trip to the GP? Private support options? Counseling?)
Then spelling out very clear boundaries such as a no to abusive language ( misogyny for example) and no to threats of and acts of violence.
If the above is not accepted and followed, kindly, you must now leave son. Here is a letter from me declaring you homeless son. You can take that to the Homelessness department at the Council. Here is the location of Homelessness department for the Council. Here is the phone number son. Maybe even, here is £250 for the next week for food. ( If you have it).
Son, here is the nearest Citizens Advice Bureau location for you.
Here is the address for Job centre plus.
Here are the numbers for DWP. You may be eligible for support. Citizens Advice will help you.
All this above in my belief is real love with boundaries. I have and do still observe and had to experience the impact of enabling toxic enmeshment by mothers to sons.
We must do all to direct away from this. Love with boundaries. You aren't an emotional or physical punch bag.