Was I sexually assaulted as a child?

I have recently been thinking about my time in high school. I was bullied badly in year 9 & also had a rocky home life and due to this I have suppressed most memories. However, I keep remembering that whilst I was being bullied I was also being harassed by a boy who was a year older than me.

I was 13/14 at this time, every time I saw him in the corridors or outside in the sitting areas I’d be terrified, from what I can remember her used to grab my bum & other parts of me and call me things in his language (he was from Romania I believe, not that this matters) nobody ever knew about it even though he absolutely did it in plain sight.

I wonder if this is why I have some intimacy issued with my long term partner, am I overreacting, do I need therapy for this?