I think a lot of good stuff has already been said. I don't think insecurities are unattractive. In many ways, opening up to your partner about something like this is a strong demonstration of trust and something that can help build intimacy in the future. Plus, sharing how you feel about things also deepens your relationship. Like many have said, he probably has no idea you feel this way, so talking openly about it is the way to go.
I think a lot of good stuff has already been said. I don't think insecurities are unattractive. In many ways, opening up to your partner about something like this is a strong demonstration of trust and something that can help build intimacy in the future. Plus, sharing how you feel about things also deepens your relationship. Like many have said, he probably has no idea you feel this way, so talking openly about it is the way to go.