Who Should I choose?!?!?!?!?!

There are two guys i like but im not sure if they like me. one is tan, dark hair, older(by like 14 days), and has a little sister that i am Những người bạn with. the other one is short, younger than me(by like a year), light brown hair, and has a little brother that is my friend too. They are both Những người bạn with my brother. we hang out sometimes, but i dont know what to do. we wer all at the bờ biển, bãi biển one ngày in the summer, and the tan one wanted to go in the water. the short one didnt want to go in the water and then i đã đưa ý kiến i wanted to go in the water, and then he đã đưa ý kiến he wanted to go. WHAT SHOULD I DO?!?!?!?!?!?!?!?!