Birthday Problems

I turned sixteen and I had a party to celebrate! I never have parties and this time I got to have some friends over!😊 We went ziplining and I even invited my significant other. We have been dating for three years. He didnt want to go ziplining because of the height thing. I was understanding. I mean like I wouldn't want someone to shove a clown in front of me. So I hung out with friends and we went back to my house to sing happy birthday, eat, and open presents. My SO promised he would be there after ziplining. Well we sung happy birthday. He wasnt there. Ate and opened presents. He still wasn't there. Everyone left and I was left all alone when the plan was to hang out with him the rest of the night. I started crying because he had flaked on my birthday. So I called and messaged and it had been two hours and he says sorry. SORRY?! That's al I got. He said he was at his grandmas which isnt far away. To get money for his birthday which is a couple days after mine. Then his parents decided to stay longer. I dont believe he even tried to say, uh hey I should really get to the party. He usually sits and waits. So he missed it. I'm not mad at him completely.....but I am? I just feel hurt. He has flaked many times before but this one hurt. I have no idea what to do and I just need help on this huge mess.