A girl in class touched me and it triggered a huge flashback

So basically there is this very touchy girl in class. Our interactions are superficial to say the least.

We talked a bit during class and I invited her to sit next to me as a polite gesture. Suddenly she leans her head on my shoulders and I shrink but don’t push her off as it would be impolite.

Needless to say I felt super uncomfortable. Then she did that another time. Later on after class I parted with her quickly as I began spiralling into flashbacks of my mom touching me and violating my boundaries.

The girl probably meant no harm as shes one of those people friendly extroverted people. However my traumatised brain just couldn’t understand that. I literally did nothing bit dissociate yesterday putting off important tasks like eating and showering.

Because of what my mother did I have no sense of boundaries and a-lot of people took advantage of that to make inappropriate advances and be perverted. I feel so weak and pathetic and slow. Im starting to realise how uncomfortable with touch I am.

Thanks for reading