My best friend sent me a picture today of my boyfriend of 3 years and my sister at the zoo. I thought my boyfriend was at work and I haven’t spoken to my sister in awhile because she suffers from mental illness and I try to distance myself from her constant drama. I have never known my boyfriend and sister to hang out let alone without me. I texted him and asked what he’s doing with my sister at the zoo and he immediately got defensive and told me he’s just trying to get to know my family better. I told him that’s fine but its it’s extremely weird that he a). Didn’t tell me and b). Went without me. He called me crazy. Am I right to feel suspicious?