Feeling worthless 💔

My ex and I were on the path to rebuilding our relationship until the unexpected loss of his mother around a month ago. After this he said he wasn’t in the right space to have a relationship / the pressure of it and he just wanted a bond which I could understand. We agreed we would only have sex with each other and we would carry things as if this was an official relationship. Recently I have reason to believe he’s been talking to other females outside of being just friends. I’ve worked so hard to show him I’m serious about us before the tragedy and stuck with him when he was at his complete lowest as well as still giving him the support he needs and now I feel as if it is all being disregarded. Whenever I ask him if he’s really in to just me (being that I have reason to believe there’s more than just me) he makes me feel insensitive for asking since he has so much on his plate. I don’t understand why just me alone isn’t good enough, being that I honestly put my heart and soul into him 💔 I know I can’t be mad about it but am I wrong for being hurt? And what should I do?