Welcome to the forum
@Dartanianrubanne
Lots of people do find travel buddies online so, I don't think your post asking if anyone would be interested was particularly unusual, rather that we sometimes get one-time posters who are not generally taken seriously. Usually it's someone who thinks this is a dating site and sometimes folk who are trying to sell something.
Look online for the sort of holidays you would like and see if any of the companies have forums you can sign up to. I once worked with a lady who did that and she had a great time. The travel company had a forum so, she could chat to other people who were booking the same holiday (she was a cruise fan) and often, they would meet up beforehand as a group.
On another note, I read your "about me" page and love the sound of your old cottage in Wales, I am a fan of old buildings. I hope you haven't been put off and that you stay around and get to know folks here.