Betrayal is the only thing that sticks?

My x friends which were also my child hood friends befriended my sister in law. my X BOYFRIEND SIS who is from another state. she currently resides where i live she also works at the same facility as i do because i helped her get a job there. she made friends with many others which is cool she also befriended my x friends WHO ALSO WORKED AT THE SAME FACILITY in which i didnt care . i have two children with my x boyfriend 7yrs and 1yrs. my x boyfriend family has been acting really funny toward me for quite sometime now but i wentt with the flow because of my x boyfriend i never knew reason why these ppl act funny it turns out the hate my guts and they dnt even know me. the judged me off something someone else said about me.aparently my sis in law went back and told her fam what my x freinds said about me . if they were feeling some type of way about me they should of asked me or said something to me about it? my x boyfriend knew these things too. they said out of anger these is the reason he cheated on me. IM STILLED PUZZLED. I DID HAVE A FEW RELATIONS befor my kids father , and that none of his business if it was befor him . who well my x sis in law broke up with her boyfriend and i befriended him to get iimformtion . it wasnt enough. SO ME AND HIM BECAME FRIENDS and started to talk alot more about our selves we even started talking dirty threw email. SHE BUSTED HIS E MAIL and exploded on me and on him she let all the beans out the bagg about what was said about me by my x friends and how her family felt about me only because my x friends told her things from my past ,things that happened befor i met her brother my x friends have skeltons that i know about and i never revealed to any one and i still dnt plan to. all this time iv been giving gifts, money, food, SITTING AROUND MY X BOYFRIENDS FAM laughing chilling with them and they nvever liked and supposling had been laughing at me and i never knew. im piss the hell OFF. iif i knew these ppl dnt like me i would of stay far away. IV CONFRONTED one OFthe two X FRIENDS AND TFREATEN TO Fu$*K her up the other one i have yet to see but she knows im mad as hell. I WANT TO LET THIS **** GO BUT I DNOT KNOW HOW i feel im blocking my blessings wht should i do.( IM GLAD I befriended the guy) I HAVE NO REGRETS if i dnt i would not have known this bull ****. PLEASE ANY one with ADVISE? im madd as hell and i feel like in gonna hurt some body