I got caught doing something now I'm getting blackmailed

I'm getting blackmailed into doing something that I really don't want to be doing but I have no option

OK I shouldn't have done that if I was being honest but I got caught doing it and now I'm being blackmailed into doing something I really don't want to do
This guy caught me kissing this other girl even though I've got a boyfriend I was really drunk and I ended up kissing this girl very passionate sensual we were basically getting carried away with each other as we had went outside with each other and let's just say it felt so good in what she did to me
My parents are really strict I didn't want them to find out about it
So I basically agreed to what he said if I didn't tell your parents you'll do something for me OK but he didn't say anything about it as he just walked away from me
I worked with him and he knows my boyfriend and parents
I was really scared to think about what he was wanting me to do to him
It was a week later when he was over talking to me saying that he was wanting me to give him a blow job every two days a week
For a while and if I disagree with him he would show my parents the photo of me standing there with this girls head down between my legs
I said OK
He's saying tomorrow night when we were working late
I just said yes
I was dreading it feeling sick nervous horrible shaking with fear of what would happen if I never done it
Anyway it was that time we were the only two working late and he's saying let's go into the toilet we are in this cubicle in the guys toilet I'm sitting down as he's standing there in front of me
He's got his trousers down and boxers down below his knees
He's got his hands on my head pulling my head towards his dick and pushing it into my mouth as he was just pushing my head backwards and forwards really fast against his dick
It was going down my throat as he's pushing himself forward into my mouth
I was trying not to gag as he's just pushing my head backwards and forwards really fast against his dick
Then he was just holding me tight against himself as he was Cummin into my mouth
It felt like he was never going to stop
After a while he finished I'm pulling my head away spitting his cum onto the toilet floor basically nearly being sick
As he's saying tomorrow night same time
As he's away out of the cubicle and toilet leaving me sitting there
I hated myself for what I had just done
I was doing it to him every time we worked late it was always the same him pushing my head backwards and forwards against his dick as if he was fucking me
I eventually went for another interview got the job and started their
So I didn't have to see him again
Until he seen my parents asking them and they told him so he's waiting for me at my work place and taking me for a run getting his blow job and dropping me back at my house around the corner