First..you are making an assumption about why he left the house and won't talk to you. You may be wrong.Don't mention this to him. Second..ask your boyfriend to gently corner dad at some time when you are at his house and support you while you ask his dad if it is something you've said or done which is making him uncomfortable. Smile and speak softly...see what happens. Don't be angry. Perhaps he thinks you are both too young to be serious...

That's a tough situation, sorry... There's two aspects that I think are worth separating a bit: his behavior, and your reaction and feelings. Regarding his behavior, there may not be very much you can do. Obviously, you can try to "corner" him and talk to him, you can try getting your boyfriend to advocate for you, or you can ignore his behavior. Maybe one of these strategies will make a difference over time, but none of them are assured of changing his attitude or behavior -- life being what it is, we can't really control or predict what other people will do. Maybe he'll come around in time on his own without any intervention (patience is often an under-rated strategy!) Regarding your feelings, that's another matter entirely. Your feelings are largely your responsibility, and how you relate to them is important. If you blame him for the fact that you feel badly, you're misplacing your own power... you've given it to him. The correct approach is to take responsibility for your own thoughts and feelings: to recognize "I feel this way because of the way I am seeing the situation and thinking about it". That puts the power back in your hands instead of his. Then what do you do? Well, if you're responsible for your feelings, that still doesn't mean that you can wave a magic wand and change them. What it does mean is that you can begin to learn to "listen to yourself". Those feelings are the result of thoughts, and those thoughts run along sort of like a tape recorder... they play themselves, without any conscious effort on your part. If you learn how to just observe them carefully, without getting all "tangled up" in them, you'll find that you get a little bit of space or opening in your mind... some room to consider the situation from more than one perspective, and perhaps even a little bit of compassion for your boyfriend's father, despite his behavior. In any case, learning self-observation is a powerful skill that will serve you well the rest of your life, and taking responsibility for your feelings is always a good way to keep from making a messy situation even messier. Good luck.

you should tell him that he is the older person and should not get stuck in such an adolescent fued. Or you might just start treating him like he acts Cough 5 cough

well you have to gain some courage and go to talk to his dad and have a little conversation about it... try to explain to hin that you don't care about being richer and try to convince him that there is nothing to be ashamed of...