herpes through skin break

i have a lot of acne form lesions on my back. 2 days back my friend was breaking them with his finger nails and a few of the bled too he also scratched my back for some time (10 mins). the next day (yesterday) morning i noticed he had active cold sore lesions on his upper lip which i failed to notice the night before.. Now i am worried if i would have contracted the infection. i saw his fingers and they were clean.
Q1.Is there a chance i would be infected if he had touched the lesion before he scratched my back. If so what cud be the probability..
Q2.when I asked him he said he had not touched the lesion before scratching me.. does this make me safe..
Q3.I have mild backache for the past 2 hrs..is this a prodrome.. when do the lesions appear if they do...

[worried404755]

somebody help..