What to do about teamates and knee pain

I am a person that does not mind pain (like getting hurt) in some way I say im tough when I get hurt but a year ago I tore my pcl (legament in my knee) by playing softball then I kinda recovered and told the doc I was ready to start playing again he said that was fine just as long as you take it easy when you first start…well im pusshing it so I dont look like a fool infront of my coach…of corse im slower then the other girls and I have a harder time.yesterday we were doing some running up a hill and I could not breath and my knee was hurting so I stoped to try to get my breath …the pain was to much so I did not finish…my teamates were up my but to finish and coach as well so I stayed after to get my running in…now today my teamates look at me and start talking about me I feel alone I feel like I failed but I dont understand they give up all the time but im always right there with them saying lets go your doing good but no not when it happenes to me they make me feel like a witch!!! So what do I do my knee is in bad shape I cant sprint that good and I dont have any energy left???