Welcome to Fluther.
This is a very excellent question. More people should ask it.
The first thing you have to do is evaluate the importance of the decision. If “the problem” is whether to have vanilla or chocolate ice cream for dessert, then you don’t want to spend much time or care in making the decision. Flipping a coin is a great solution for maybe 90% of the decisions you’ll have to make in life.
But you’re asking about the other 10%: Do I accept Bob’s proposal of marriage now, or wait to see if something develops with Fred? Your life results could matter greatly based on how you answer that question. It’s worth study, obviously.
Well, of course, Bob’s a fantastic kisser, but… And Fred has a lot of potential, but…
So you make lists. Internally in your head or physically on paper or on a computer. Make lists. Be sure to keep them private. You don’t want other people influencing your decision except to the extent that you ask for advice!
Make a list of the things that Bob has going for him, and the strikes against him. How you feel (pro or con), even if it’s only relative to “the other guy” is a valid criterion for your decision, but you have to decide whether to give more weight to “Fred’s awesome potential as a husband and provider” (if you want to think of him that way – put it on the list) vs. “the way I feel when Bob walks into a room and smiles at me”. It all counts, but only you can say how much.
It’s worth asking people you know and trust with more experience on these matters “How much weight should I assign to the way I feel when Bob smiles at me?” “Will I grow to really love Fred the way I feel about Bob now, even though he’s kind of nerdy and, frankly, boring a lot of the time… but he always answers my call and he never breaks his word?” Wise people will help to guide you which choice is more apropos for the long run. But you have to ask the question, or at least ask it internally (some might call it prayer) and watch for the answers that occur in life, just waiting for you to notice.
Finally, and I know I keep saying this over and over again, but you haven’t heard it before: Ask the right questions. (This one you’ve asked is an excellent example.)
Don’t ask “Why is this-or-that so bad?” “What’s wrong with this thing?” Instead ask, “How can I do this thing better?” “What is the best thing I could do at this moment?” Your mind will work towards whatever solution you want it to come up with. If you really want “a list of problems in the world”, you can easily achieve such a list. And you’ll be depressed as all get-out with the result, and no closer to a solution. Ask, “What can I do to improve the world?” and you’ll also come up with a list of things that you could do (or at least try), and you’ll feel better for the effort.
From time to time also ask yourself, “What am I not paying enough attention to now?” to refocus where you want to be spending your life, too. That’s another question that people don’t ask themselves often enough.