Love isn't a feeling, it is a verb- that is sometimes accompanied by a feeling.
Sometimes it's convenient. Sometimes it's comfortable. Sometimes it's a struggle. When it's a struggle is when you have to work harder- and that goes for both parties.
Look at the Biblical definition of love:
Love is patient, love is kind. It does not envy, it does not boast, it is not proud. It is not rude, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. Love does not delight in evil but rejoices with the truth. It always protects, always trusts, always hopes, always perseveres.
Love never fails. But where there are prophecies, they will cease; where there are tongues, they will be stilled; where there is knowledge, it will pass away. For we know in part and we prophesy in part, but when perfection comes, the imperfect disappears. When I was a child, I talked like a child, I thought like a child, I reasoned like a child. When I became a man, I put childish ways behind me. Now we see but a poor reflection as in a mirror; then we shall see face to face. Now I know in part; then I shall know fully, even as I am fully known.
And now these three remain: faith, hope and love. But the greatest of these is love.
No talk of fuzzy warm feelings. No talk of looking good. But lots of talk about putting the other person before yourself- an action that isn't very easy for us to do.
A book that my pastor HIGHLY recommends to those struggling in marriage is "The Love Dare". I've seen it, and the principles within it save a couple marriages in our church.
Good luck Snafu.