Betta and apple snail in a .5 Gallon tank?

I have one betta fish and an apple snail that i just introduced to a .5gallon starter tank. My betta fish is pretty cranky (he flares a lot) but i did some research and i've been told that they would be ok together. My betta Moe keeps flaring and staring poor Scoot down, but hasn't nipped at him or anything. Should i be concerned... or should i give them some time to get used to each other. The snail doesn't seem to be bothered at all by the betta. If any of you have some experience with bettas and snails i'd quite appreciate your answers. thanks!