ok so..i'm going to try and make this short...my boyfriend and i went through some trust issues this time last year bc of some inappropriate text msgs between him and another girl at his work..nothing ever happened we got through it whatever...that was a year ago

things have been really really good lately we've been together 2 1/2 years now and he recently moved into a new place and gave me spare keys which i thought was a big deal that i can just come and go you know..its nice...and he wants me to move in but..my rents would kill me and i'm not big on doing that and i feel like thats a step for marriage anyway

ANYWAY...i've gotten much better with trusting him and what not but today he fell asleep early at his place and i went to charge his phone and saw a msg from "j" which usually i didn't question bc that was his old roomies nickname and i just figured that was what the contact name was...but i saw his old roomies name on his contact list so i started to wonder who "j" was...well i texted from my phone and i find out its his ex girlfriends sister...which i just think is really weird...there were no outbox msgs from him to her because he clearly deleted them the only msg i saw was the one that was msged before i plugged in his phone...so..does anyone else think its weird that my boyfriend is texting his ex gf's sister...(he hates his ex by the way bc she cheated on him)...bc i just think its REALLY weird..bc they were never good friends or anything..and as long as we've dated i've never known them to be friends or talk..so its just random that a)he would lie about who the number was and b) its weird that they're texting each other period..i mean..i dont keep up with my ex's siblings....

am i over reacting? feedback please i'm just wondering WHY he would be msging her..its not like he's trying to keep up with his ex bc he cant stand her...i'm so confused and not sure how to bring it up bc i'm sure he'll be upset i looked at his phone