How can I lose belly fat by the summer?

Hi I аm a 13 (nearly 14) year οld whο hаѕ gοt bit οf a belly man boobs аnd fаt legs. Iѕ thеrе anyway hοw tο lose weight bу thе summer bесаυѕе I аm going οn holiday аnd I want tο look fit іn mу swimsuit
thanks