Boyfriend Issues/troubles

i was in my room and bob had friends over (bob is 23 friends are 17-18). bob and i have broken up for a week now and i asked bob to move out in month time and he agreed. so because we weren't talking bob invited some 4 friends over for a drink. i watched dvds up stairs. because the friends were young they cant hold their liquor so 3 of them spewed up. only one of those friends were single. so my bedroom is next door to bob so i can hear everything. he went into his room and had sex with her and they were loud on purpose. bob knew i was awake. i couldn't believe he was doing this! it was rude. i don't care that he was sleeping with someone else it was the fact that i have done so much for him and helped him get on his feet and this is how he treats me. so i walked in there and told him to move out today, not in a month. i interrupted his fling so he never finished. is it just me or am i being silly. or am i in the wrong?

here is some info...
bob and i have been friends for 9 years. he was always there for me and i for him. he got kicked out of home so i asked mum if he can move in because i didn't want friends living in their car or couch sleeping. so he has been living with me and mum for 3 years. I've had other b/f and bob has always supported me and helped me through them. i have always known that he has liked me so one day i said he is my best friend - same interests, likes, but at the same time so different etc... lets become bf and gf. we went out for 1.5 years before this happened. bob didn't want to brake up. but i couldn't be with him any more. i have broken my ankle and i cant do much so i have relying on bob and mum to help me out. he has been okay but he isn't the type of person to look after someone he needs someone looking after him.
he has never been in a job for longer then 6 months and i always supported him when he had no money and all that. he likes to drink a lot and thinks its funny to be broke all the time. he gets hands out from his parents and mine. he is the type of guy who is shy. he is not a player! i cook for him and clean after him and washes his clothes and bed sheets. my parents are divorced and i had to raise my brothers and i and mum through everything. im a strong, dominate person and i don't mind cleaning in fact i like it. i wanted a man who helps support us not one person supporting the other. if we had kids and i got sick i know he wouldn't handle looking after everyone. bob isn't good looking, chubby and isn't good in bed... but i over looked all that because i know he is a nice guy deep down but then i got fed up and realize i don't want to live my life for someone. i want to live equally next to someone. i have been doing a lot of sole searching since i'm waiting for my ankle to heal.