There are many groups that have been instituted by the Church in
order to aid Catholic youth in every aspect of their lives. Youth
groups, prayer and study groups, work groups, Bible groups, various
activity groups, etc. , all exist and are offered through many
parishes. Before Vatican II there were many prestigious groups that
existed in many countries, however, these have broken down of late
as religion seems to become more individualistic and
progressive.
Youth have a choice, and despite all the groups and offers made
available, the youth must choose to use them. One cannot force the
youth to stay in the Church if they decide they wish to leave. It
is part of the priest's duty to establish good groups for Catholics
to interact within, especially when it seems necessary as part of
the apostolate for the salvation of souls. Contact your local
parish to see what is available, and if nothing is, perhaps it's
time to ask the priest why?