I know that traveling separately can sometimes put strain on a relationship if you are not respectful to each other, so I think this is a topic that many couples struggle with. (ordinarytraveler.com)
It may put a lot of strain on your relationship with your partner, especially if this continues for several months or even years. (abckidsinc.com)
It can put a lot of strain on a relationship. (datingadvice.com)