הכרויות חינם|מין מזדמן

Me (30M) and the girl i like (29F) have been dating around 4 times now. Honestly everything between us is good. We enjoy spending time together and no big problems so far.

Only thing that keeps bothering me is her best friend. I start noticing almost every time we already make plan together, suddenly her friend need something.

Sometimes she ask her to hang out. Sometimes she have some problem and need advice. Sometimes she just call because she miss her. At first I think maybe just coincidence.
But after happening many times, it doesn't really feel like coincidence anymore.

Last week she told me her best friend said, "Don't disappear just because you having a date now."
I actually understand that. I don't want her to stop seeing her friends because of me.

But now every time we trying to spend more time together, somehow her friend always appear with something.
I don't think she's bad person. Maybe she don't even realize she's doing it.

I also don't want become controlling boyfriend or make my girlfriend choose between me and her friend.

Should I tell my girlfriend how I feel? Or better just ignore it for now and see if it change by itself?