Would you be pissed if...

I’ve been with my boyfriend for 4 months now...2.5 have been long distance. Today is 4 months for us and I’ve talked to him on and off today and he hasn’t said anything about it. Let me make this clear right now: I’m not expecting gifts or flowers. In fact, I’ve told him that I don’t expect a present for everything single month anniversary. However, a small acknowledgement would be nice. Just a little “happy anniversary” text or snap. I don’t want to be overly sensitive, but I am feeling a little hurt by it. What do you guys think?