So i tore my acl...for the 2nd time and im having trouble getting back "into the game"...help?

so yea like i said i tore it again and had surgery in dec...so now im walking fine and maybe even going to be running lightly again. im a huge sports fan and played 12 seasons of varsity sports all through highschool and was gonna play baseball in college. but now im having a hard time find the will to get back out there, the motivation to really care again and im not sure if i should just give up. most days i feel like there isnt anyone who believes in me anymore. please help.