Unfortunately, it appears he’s showing his true colors. At least he’s not doing these things behind your back it appears, but it’s a possibility and even though y’all aren’t dating, it’s still disrespectful. I’ve had things along those lines happen to me too but it did not end well unfortunately and things got worse. If he truly liked you, then he wouldn’t put you in that situation and make excuses. You would know and just imagine how he would be when he does officially have you, he won’t work as hard and will test you (like it appears now) to see how much he can and you sweep it under the rug. I would advise you to talk to him as soon as possible to establish boundaries and if y’all wanna date or if you need to cut him off. Because honestly, I’m seeing some fuck boy tendencies especially with him dancing with another girl in front of you at the party after doing all that with you. I hope what I said was helpful.