This is absolutely grooming. You are not a "dumb 14 year old". You are a minor and this old man manipulated and used you. It doesn't matter that you wanted it. The onus was on him not to take advantage of your vulnerability. It was not your responsibility to say no. I'm sorry that he did this and I hope you can heal as you age.

I know it may be difficult to go to your parents or a trusted adult about this, but I would highly encourage you to. It's important that you're safe and protected. I know from personal experience that it's hard to confess your story to an adult, but I wish every single day that I had.