So it would be a great big shame to throw away this pairing on the basis of selfishness. Christian wisdom says marriage is the joining of two to become one body. Inevitably, this means dying to self every single day. Dying to self every single day is the work of a single person, as well, but that work is multiplied by the decision to be married. I quite disagree when people say relationships are 50-50. I think a loving relationship is where each side gives 100. This stands in contrast to your anticipation of serving the self in the long term so it is good that you speak about this in good time. You know when you are ready to be married not when you fall head over heels in love, but when you make a commitment to not be self-ish. Have no delusions about what it means to have a successful marriage. It is a life-sentence with no opportunity for parole and a commitment to selfless growth.
Two Christian friends of mine have been married for a few years now. Their courtship was mostly sunny skies and, for the rest, they were focused on bringing glory to God with their courtship and marriage. But after they got married it was a whole other story and they almost filed for divorce in their first year. One another's sqewed expectations of marriage started to seep in. For instance, the husband would leave his dishes in the sink expecting it was the wife's duty to clean. The wife spent a disproportionate amount of time pursuing promotion in her career to the detriment of her marriage. There were lots of such examples. But, in both of these examples, the problem was that the two individuals were catering to self as a priority instead of to each other. This is where the cracks appeared and were getting bigger with each day. However, they fixed this when they made the decision to not fight for self and therefore against one another but, instead, to fight for one another.
They are intentional about making their marriage work and do not live under the illusion it will work without work. They make their marriage work by being intentional to capitalize on the strengths of what would be considered astrological influence. So, rather than argue, they work out together like a team doing all kinds of physical exertions. They've also figured out one another's love language and that they speak different love languages between them. For her, love language is affection whereas for him it is acts of service. So, he can be intentional about feeding into her needs and she is intentional about feeding into his. They also ensure they give each other free time to pursue their own interests and even take separate girls/lads holidays, but this is balanced by rules they have such as to be home by 6 pm every night (excl. holidays) when they are intentional about raising their family together.
Your relationship and marriage will be only as strong as you make it. You can't have your cake and eat it, but the truth will set you free from the desire to do that anyway. Maturity is key. Only two complete number 1's can make one complete 2. Nobody should expect perfection but you should pursue it (and it does not come from being a slave to self). Good luck! x x x