Time travel-what would you do if you have the ability to go back in time

When I was in college I had a crush on a girl. I was afraid to say it to her. I think most probably she knows about it because of my body language. On the last day, she looked at my eyes for a more than five minute. My heart started to beat faster on that day. I really wished that I had said it to her that I loved her. If I get a chance to go back to the time, I will certainly would have said to her that I loved her and made her my wife.

I want to fix our error which i did in my past.

school time...

Well if I had this ability than I would like to repeat all the sweet things I had in my life

i will rectify all my mistakes for which i have regrets.