Pushing daughter to participate in sports year-round?

My middle school aged daughter is extremely active on her own (swimming, bike riding, etc.) and she participates in one team sport, lacrosse, through her school.  Lately she’s talked about not wanting to pursue other sports opportunities which she was interested in in the past.  Should we push her to keep going or should we let her make up her own mind?  I don’t want her to regret not participating later and organized sports/activities are great ways to meet other like-minded kids.