Is this okay...............?

last week i had one of my friends over to watch a movie (the friend is a girl). and it was a long movie and it was almost 10:45 and she fell asleep with her head on my lap. i really like this girl, but i dont know if she likes me the same way. she is a very heavy sleeper, she was dressed really sexy, and i took advantage of a situation. i slowly and gently stood up let her sleep. i stood there looking at her and before i knew it i was hard and it wouldnt go down and i though there was only one way to fix it. i sat down on the floor next to her a pulled down my pants just a little and started to jack off. i gently slid my hand down her panties and i was touching her which made me even more hard. one thing led to another and i was starting to kiss her aand i had completely taken down her shorts. but shortly after that i came and lost interest. i pulled her shorts back up. and she didnt wake up for like 30 minutes and she came downstairs and was complaining that she hurt "down there" and i said like what kind of pain is it and she said like the kind i got after i used a tampon for the frist time. but is still didnt tell her. is this okay??? should i tell her??? if you were her and i told you would you be mad???