We both have very different priorities

My fiancé and I have different priorities when it comes to how we spend money. I am not that keen on settling down and focusing on a house, because I think we should travel more and have more fun while we’re young. He believes the opposite to be true and wants us to save first and enjoy ourselves when we are much older. I understand his perspective and don’t think he’s wrong, but I also worry that he may make our early lives together seem less fun and more serious than they need to be. This has already caused a few arguments between us, and it is starting to feel as if there may be other areas that we have not discussed and that may lead to friction between us in the future. How do we resolve something like this?
All relationships need friction and the give and take of ideas before you can arrive at some semblance of clarity or understanding. It’s perfectly okay to have different points of view, provided you are both clear about the big picture. Yes, there may be other areas on which you differ, but that may happen all through your lives because you are both individuals with specific desires. Treat this as the first of many problems you must tackle together, not as something that is a hindrance. It is extremely easy to arrive at a compromise that works for you both, and it is also easy to jump to conclusions and assume your lives together will not be fun. Why not tell yourself it may all work out instead, and treat it as something positive rather than negative from the outset?

Should I ask my friend why she didn’t invite me to a party, or should I let it go and just give her the benefit of doubt?
If she is a friend, and you want an explanation, you should be able to have that conversation. If something is bothering you, ask directly, because it’s the simplest thing to do.