There are only 3 rules that I follow for serious relationships, and since I've learned them, they have never failed me...................
1. A relationship is 1 plus 1 equaling 3. Yeah, I know, sounds like bad math, but it's not. I'm totally independent and can operate in the world all on my own. My partner needs to be the same way. (That's where the one plus one comes in), but together we create a third thing that cannot survive without the both of us, and that is the relationship, which is where one plus one equals three. Them, me, and the relationship makes three.
2. A relationship IS NOT a 50/50 proposition, but rather 2 people combining every day to make 100 percent. Some days, she (I'm hetero) is only able to contribute 20 percent because of being sick, work, etc. I need and have to be able to come up with the other 80 percent to keep the relationship whole. It doesn't matter who contributes more, just that you can make the 100 percent each day. Some days, the sides are reversed, and I'm not able to fully contribute "my share", so she's gotta be willing and able to make up the difference. If I keep it at a 50/50 standard, what happens if she gets seriously ill and isn't able to make her half? I get resentful, and start to hold back because she's not contributing enough in my mind. Same thing in reverse, because if I can't make my "fair share" because of life circumstances and she feels that I should, she will get resentful of me, and the relationship will fail.
3. A relationship can survive on a ratio of 51 percent love, and 49 percent lust. If the ratio hits 50 love/50 lust, or lowers below that (say 45 love/55 lust) then the relationship is in serious trouble. But, there needs to be a bit of lust, because there has to be something to attract you to them. And, if you want to know the difference between the two, ask yourself just one question and answer it honestly (and it's a bitch goddess of a question)..............do I truly enjoy the person, OR, do I enjoy myself through the instrumentality of that person. The first one is love, since I enjoy the person regardless. The second one is lust (enjoying myself through the instrumentality of that person). If I'm enjoying myself through the instrumentality of their money, then what happens if they go broke? I'm outta there because the money is gone. If I enjoy myself through the instrumentality of their looks, then what happens when they get old, or possibly have an accident and become disfigured? If I enjoy myself through the instrumentality of whatever it is they have, when it's gone, then so am I.
But................if I truly enjoy the person, then job or no job, looks or no looks, rich or poor, I enjoy the person regardless of what they have, because I'm not there for what they can give me, but rather there because I just enjoy being around them.
Whenever I start to get serious about being with someone, I check my relationship with them against those 3 rules to see if I'm serious about being with them. If it looks doable according to those rules, I go ahead. If not, then I don't.