First I want to say I think your English is perfect.
It sounds like you are wonderful person to call a friend. What makes you feel afraid... is it the memory of a past hurt, a voice you hear (what does it say?), a scene you imagine?
Imagine what might begin to happen... next time... if you think about all the good things you have to offer and can bring to a relationship.
Whenever you feel afraid to "make a move" think about your Uncle, imagine yourself in his position, make it as bad as your imagination allows, so powerful that the images make you scream " This fear is not what I want and it will not keep me from finding love." Use the energy of the fear to move through it to what you really desire.