burnt out

have been swimming year round since I was eight years old. I am now going to be a sophmore in college. I have lived and breathed swimming since I first started. My life revolved around swimming and only that. Through high school I gave up hanging with friends to go to swim practice. I never really was a great swimmer even though I worked super hard to be succesful. I did swim one year in college. I am completely burnt out and cant stand to go to swim meets and not be able to swim the times I did when I was 13-15. now 20. It kills me and after my freshman year and this summer I have made the decision to call it quits because I 'cant put my self through all this hard work to not see results and swimming just dosent make me happy. Am i making a huge mistake and what happens say a year from now when i miss swimming greatly? will it all be ok then? I was so sure on my decision but when other people dont support me like coaches and parents etc its hard. I just need some advice or encougagement! thanks!