puffy/flat nipples

so i have puffy ish flat nipples and i think they look so gross on me and i’m so insecure about them and i don’t know what to do. they’re so ugly and they only get hard and small when it’s cold or they’re continuously stimulated and i feel like i’m the only one with this problem. i’m insecure every time a guy wants takes my shirt or bra off and they look like mountains. are anyone else’s nipples like this or is it just mine and what do i do about it ? thanks