Some people might asked me for opinion about relationship. Well if you insist ;
If he treats you like a douchebag, kiss him goodbye.
If he did say he can finds a better girl, just leave him.
If he don't even try to go out with you, make time with you he is a jerk.
If he didn't text/call you in a day, ask him Why? If the answer is nonsense, very well a very goodbye for him.
So, if you're in a relationship, you're lucky. You can still find the right person before you get married.
I'm not saying it is easy, but it'll worth it one day. My marriage life is not easy. There's a lot of things I've learned from my past. Alhamdulillah, so far I'm happy and I love my husband. He might not be the perfect guy at least he never stop makes me happy each day.
Marriage is whole different world. It is so much better living in hell during relationship. Everything is halal. Go for it,do what is right. Keep your partner happy everyday :)
Ps : Don't forget to tell that you love them everyday. It works.