And you shouldn't have been chasing after an older man.
I'm not blaming you. At 16, you were impulsive and impetuous. We all were. But you do have some accountability here for putting yourself in harm's way and setting an inappropriate sexual dynamic into play. You manilulated him and for manipulated in turn. You can't toy with people like that without consequence. Clearly, you were not given a robust sexy education; you were failed by your elders and all of your caretakers. You're not the first, you won't be the last; indeed this is the sad state far too many of us enter into our sexual lives. Meaning, we have to learn these things the hard way.
For that, I am so very sorry you had to go through that. You should have had better; been set up for success. We all should have.
I truly hope you're doing better now. I hope you can and have noved forward stronger. I hope you remember, and that if and when you have children you are mindful about setting them up for success so that they don't find themselves exposed to danger and predatory sexual behavior like you did. Doing so will lead from you accepting some accountability here to being responsible for it not happening again within your sphere of influence.
All my best.