Girl bestie?

Hi soooo let me know if this is odd. But my boyfriend and I have been dating fooor let’s say forever! We also have a 2.5 year old. Anyway. He has this girl best friend and he’s known her since 6th grade but they stopped talking till high school. Blah blah. When we first started dating he had her under “best friend💕” and I said naaa I don’t like that why did you put her name as that and he said “she told me to” and I told him to change it bc that’s weird. Anyway fast forward like 4 years. We finally meet her and her husband and they’re genuinely good/nice people. She seems nice and actually just trying to be friends. So since we’ve been hanging out (as in us 3 and her and her husband) my boyfriend and her have been texting/snap chatting almost everyday. Usually it doesn’t bother me but now when he’s replying to her instead of me I’m like HELLO. you don’t see me texting her husband everyday?? Yesterday we went to the flea market (swapmeet) and we were all together. As soon as we left she sent him a snap saying “I got my boots😍” and I’m like sis weren’t we just hanging out? Why do you still need to text each other even after we just got done hanging out? Am I being crazy? Or is it weird. Like I know I’m going to get others talking about “wellll I let my man hang out w his girl bestie alone and talk everyday” like isn’t that why you’re the girlfriend? Not only that why am I with you if you’re texting someone else everyday? And not even giving me my attention? And I know what he’s gonna say “see this is why I can’t have friends” like na she could at least include me like like “hey girl I had fun with yous!” Or something but she doesn’t? Help.