My ex's grandmother died...should I say anything?

Long story short, I was basically involved with this guy for a while & he ditched me for his ex-gf of 5 yrs. He never really treated me good, but for reasons I can't explain I care about him. I was really heartbroken when he went back to her & it left me a mess. For a while I was borderline obsessed with him & I couldn't move on from him & get him out of my head. My. Life. Revolved. Around. Him. I guess it was so hard because he was the first guy I did anything sexual with & he basically cut me off from his life. He won't talk to me & he ignores me if I try to talk to him.

I guess my question is, even though I doubt he cares about me & he obviously doesn't want me a part of his life... should I give my condolences? He was such a negative impact on my life & only recently have I started to get better...but at the same time there's history there & a part of me still cares about him.