If a guy or girl has a fear of relationships, it can be useful to understand what is behind this — a negative experience, any negative suggestions, or hidden internal benefits.
One of the most versatile methods is the method of small steps, doing not just light things at first, but extremely light and small things.
For example, for starters, it makes sense to do completely “parallel” things: your body, playing the guitar, mastering sports that are good for team pastime (skiing, cycling, kayaking, etc.) Along the way, it turns out that some people , boys / girls — will be nearby, companionship will appear, which can gradually develop into friendships. In parallel, a positive communication experience will be developed. When “just communication” no longer causes great difficulties, you can move on to closer relationships (with the same circle, or expanding it with new acquaintances), etc.
If there is an opportunity to talk with a psychologist or get into good psychological training, this will always be a good help.