I f19 fucked up my friendship with m20 how do I apologize?

It’s been less than 48 hours since I should have gave my apologies to him. I f(19) went to strength training with team last night and he m(20) was there because he is our manager/team assistant coach. He sat on a bench where I was doing our core workout, and I was feeling unwell prior to him getting there. He sat and observe and I told him “go away” and he replied with “don’t let me distract you” so I stopped my workout because I was simply not able to continue my reps. I stood for 30 secs after our conversation and immediately left the room and went into the locker room where I sat and passed out. Twenty minutes later after gaining consciousness and still feeling weakness to walk, I went back to the strength and conditioning room and grabbed my stuff to leave because I felt weak; as athlete I felt weak physically and mentally and I also felt embarrassed to even be there when I couldn’t d a simple workout. He came to check up on me and ask what was wrong but I brushed it off saying “nothing, in ok” because I care too deeply about his opinion and persecution of me, I didn’t want him to see me weak. I’ve been pushing him away from the longest time when he’s only trying to help but it’s because I don’t want him to burden himself with me and this was his last string of patience where he just gave up checking on me and talking to me, which I completely understandable. I just wish I wouldn’t have been so stupid as to make him belief it was fault of being there that let sequence of events