Am i wrong or was she overreacting, and i still like him?

ok, so a few months ago i started dating my friend's ("summer")ex. now, before you immediately take her side, hear me out. she broke up with him, and she was mad as hell. apparently he called up her best friend ("tracy") and said that if "tracy" would kiss him he would break up with "summer". when "summer" found out about this she yelled and screamed and sank into a depression. eventually she hated him so much that she cruelly broke up with him. i dont know what she said to him, but he sank into a depression. i was worried about him, because he had some past problems with cutting, so i started texting him, checking up on him. then one night, he needed a self esteem boost, so i told him that plenty of girls liked him. when he asked who i named a couple who really did like him, but he said he already knew and wasnt interested. when he asked who else, i told him i did. he said he liked me too but hadnt known if i liked him so he didnt say anything. he asked me out and i said yes, but said we shouldnt tell our friends just yet, as i didnt know how "summer" would react. so the next day at school, during lunch we tried to sneak off alone, but his little brother followed us. when we finally lost him we sat on a curb away from everyone. my best friend came by then and figured it out and she was fine with it so that was a relief. but then we found out that his little brother had gone back and told everyone (including "summer") that we were making out. needless to say she was very angry and gave me the silent treatment for the rest of the day until i texted her and told her i was sorry for not consulting her first. she forgave me after i told her i was going to break up with the guy. she so graciously and kindly came with me to break up with him the next day, for "moral support". when i did, he took it well. meaning he didnt plead and protest, which would have broken me down. now we are friends again, talking and laughing together like normal, and the relationship hasnt been brought up in a long while. but the problem is i still have feelings for him, and i never got to experience a relationship with him. i want to get back together with him, but i dont know whether or not i need to ask "summer" about it. also was she overreacting or was i not thinking? i thought that if she broke up with him it would be okay for me to be with him, but according to her, the "wound was still fresh". opinions??