really stupid jealousy problems

alright so i hate myself for this a lot but if feels like i cant help it at times. anyways i have a great relationship with my bf and hes very good to me but here’s the thing, he likes to watch anime a lot and while im perfectly fine with that (although tbh sometimes he watches it a bit too much but thats ok) he tends to develop a liking to some of the female characters. he calls them cute a lot and even calls them his waifus. and everytime he does i get jealous. i hate the fact that i do this because i do pretty much the same thing and its very hypocritical of me. i know that this jealousy is probably stemed from some insecurity and anxiety issues that i have but i just want to know how i can stop this. so any suggestions on how i can stop this would be very much appreciated!