I have Saturn in my 7th house natally and when I had Saturn return a few years back, a major relationship ended and there was a heart breaking new beginning (with someone else) which never really began properly and it too ended making me feel like relationships are too hard. Just stay single - that's the lesson of Saturn in 7th. Now, do you guys wanna swap? I rather have transit of Saturn and not live with it in my 7th...haha
Saturn is not that bad, it is more potent than for example Jupiter. I hardly felt any effects of Jupiter transit even when it was conjunct my natal Moon, but Saturn, good or bad, it will deliver. It helped me lose the excess weight I was struggling with for a decade. That year it was in my 6th! And the relationship that ended when Saturn was in 7th, was actually not a very good relationship. So I'd say Saturn actually gets you to be honest with yourself, it challenges you, takes away the rose coloured glasses and gets you to look at yourself, at your surroundings and at your relationships. Its the mentor that you need when things are hard. Its that quiet whisper in your ear... 'what the hell are you doing?' Its tough love. I love Saturn and I hate it. It does rule my Sun and Mars (in Capricorn). So I can't escape the lessons of Saturn
BTW regarding modern astrology (which I'm getting further and further away from) if you want to look at when you have a potentially good romantic period look at transits of Jupiter to your natal 5th or 7th ruler (easy aspects such as trines, sextiles and conjunctions). While commitments are more likely when Saturn makes easy aspects to 5th or 7th ruler. I am still testing this and not sure of its accuracy... but I read it somewhere a while back.
hope this helps!