What's wrong with me , I can bearly run ?

Yeh I'm 16 and basically can't run for some reason , I'm 175 cm and about 67 kg . And for some reason I can only run about 200-300 metres before I get tired my lungs burn and I can't run anymore , I used to play tennis 5 hours a week . And I do must Thai kickboxing ! I can do all that but I can't run? Cause I get tired to quickly and I start puffing ? Anyone know why? . I'm fit active don't smoke or drink. Only thing I can think of is asthma and i don't have it ? Can u develop asthma when ur older?