In my spare time I help out with running a Facebook page and its accompanying website/blog. I only ever wanted to be involved with helping out online, but now the owner of the website keeps asking me to come to events in person. I don't want to be involved in any of the in-person events, as travelling outside of my home city on my own would cause me a lot of anxiety, and also my Asperger syndrome would make these sorts of events very difficult for me anyway.
Even though I have explained the above to him, he is very persistent and won't seem to take no for an answer. Apart from this, I get on with him well and I like helping out with the Facebook page and website. I even asked my step-dad if I could to one of these events, but it would involve a lot of travelling and he said no (which didn't really surprise me - my parents are very protective of me due to my Asperger's and anxiety - I am not very "streetwise".
The website owner is so persistent though - he keeps sending me invites to these events, even though I say no every time, and I've made him fully aware of my difficulties. I don't want to fall out with him though - how can I get him to accept that I don't want to be involved with anything other than the online stuff?