Bathing Suit Confidence

I was bathing suit shopping today and I found a really cute bathing suit that I loved (which is a miracle because I'm super picky). The top was a army green cross back and the bottom was black and high waisted. I really like it because it doesn't show much of my stomach. I asked my boyfriend what he thought and he said "it's ok" and when I asked for a more positive response he said "no lol". later he messaged me and asked me why I didn't get a "real bathing suit". I asked him what he meant because, ya know, what I sent was a legitimate bathing suit. he then sent me a picture of a really tan, fit girl wearing this skimpy two piece...( I'm pale, with a few extra pounds) ..I just don't know what to do. I want to keep what I have but I also want to have something to wear that he finds me attractive in. Opinions?