If you don't mind me asking - have you tried this successfully with your partner or is it something you don't need? <<<
We have different days of the week off, so usually swap who's day off it lands on. The "schedule" doesn't bother me, because it's something I can look forward to, prepare for.
Spontaneous just isn't working, so time to try something else.
When dating, people usually go out on Fridays or Saturdays & then, probably have sex after. So how is that any less scheduled. Actually, being in the same house & around each other all the time, can remove the spark for spontaneous sex to happen. There's never a chance to miss the other, like when dating.
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I don't want her to make love to me for the wrong reasons. I wish she would start initiating sex for the same reason I do and not out of fear of loosing me... <<<
(I only meant to mention the affair thoughts if she's ignoring you totally. No need to bring it up, if it will make things worse & she'll get suspicious of you!)
Otherwise ... No reason is the wrong reason, if it's done from a place of caring. She cares for you & your needs, so she'll have sex for you. You do things because you care for the family, even if you don't want to?
It's probably that she doesn't feel love the way you do from sex. She gets her love feelings in another manner. Maybe the massages are enough, or the things you do for the family, or gifts you buy, or the quality time together.
Look for the book, The 5 Love Languages. If you Google it, there are some short tests online also.
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Even though we might have great and satisfying sex after I massage her, I am feeling like my massage is becoming a prepayment for sex. Sometimes I believe this actually bothers her too. <<<
Bring it up. No guessing, no believing what she might think. Talking about what you both want will lead to more intimacy. Maybe you can trade massage for BJ. Or oral for everyone. Switch it up.
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I talk to her on a regular basis (not all the time, maybe once or twice a year to not tire her with my feelings) <<<
But since nothing is getting resolved ... all the bottling up is just hurting you. Making a vicious cycle. You're hurt, you need sex, you don't get it you get more hurt, want sex more, don't get it .... How should your feelings be minimized as an equal partner in the relationship? A plan of action needs to be decided on, or you'll keep resenting.
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And greetings To Sweden as well. How exciting. A beautiful country you have!