I don’t know what happen to him. He knows that I’m heterosexual and that I’m not thinking on men, only him. I don’t understand him.

You’re right in the kind of activities to choose and join a group to learn something. Only that I will have to beat two obstacles instead of one: Being able to relate to a group and being able to perform in a perfect way an activity. My performers, no matter what they may be, put more pressure onto myself when I have to do it in front of people.
There are only two things I naturally can do without feeling so much pressure: Teaching and handling with doggies. These two things makes me even forget that I have social anxiety.