What happened on the day you met your husband/wife/lover/life partner? The meeting was indicated in your chart (and their chart). When a major relationship manifests, it always shows up in both charts. But how?
Check the progressions (your "internal transits"). They show how your natal potential is manifesting and they modify the current transits. If you're wondering what a progression is, it's the position of your natal planets after they have moved a certain number of degrees per month or year. There are two dominant methods used by astrologers to calculate them (Solar Arc Progressions and Secondary Progressions); I use Secondary Progressions.
I have found the following progressions to be reliable indicators of major relationship kick-offs (initial meetings): one person's progressed Moon aspects the other's natal Sun and/or progressed Sun aspects the partner's natal Moon or Venus. Or, one person's progressed Sun aspects the other's progressed Moon or Venus. These progressions don't trigger 100% of the meetings, but I've seen them in many cases. And they don't guarantee the longevity of the relationship, just that it's going to happen.
This tells us that before you meet your special someone, you have to be ready. And they have to be ready to meet you. Strong synastry and a knockout Composite chart aren't enough. The meeting must be triggered. Did you think you just floated along and randomly connected with your lover? It's all timed. Of course, you need to factor in the transits that are happening, plus your natal potential.
If you've been single for awhile, check your progressed Moon or Sun. If they're changing signs, you'll start to resonate with people who express the energy of that sign.