I totally know what you're going through and even believe (still) the same thing you do: love never fails, or, in my own choice of phrase, love never dies (it only changes in expression). Before I met my wife, I had two prior serious relationships with women that, for different reasons, ended. I am still quite friendly with the first (with my wife's blessing, mind you) who has married and just celebrated the second birthday of her son. I could not be more happier for her and I'm glad we kept in touch even through the nastiness that follows any breakup, even one such as ours where we realized that our relationship had simply run its course and there wasn't really anything to blame anyone over. We had become different people with different wants and needs. Some things, of course, needed to be said about our relationship which, thankfully, we said in the course of the break-up without rancor or malice. We became better people for our future spouses because of that clearing of the air, so to speak. We also became better friends because of our honesty.
The subsequent relationship began as a simple friendship that slowly became something more. Without going into details, it ended rather nastily but, in my effort to learn from my mistakes and to not play the blame game, I took alot more responsibility for things than I probably should have. Over the years since, I have come to see that while I was culpable for many things, notably complacency and aloofness, she was equally at fault in other areas. The incredibly sad thing, from my perspective, is that it damaged our simple friendship. I could easily get along without the romantic component of our relationship, but, in the end, I lost one of the few people I've ever been able to open up to and whose company I enjoyed. As I am one of those people who also enjoys being alone, having someone who I just liked being around, with whom we both can appreciate our mere presence in silence...losing someone like that was quite a blow. In some ways I'm still smarting from it.
We never had that final "clearing of the air", though, at least not as honestly as the first. While over the years we have communicated to one another, it's not the same. She has moved on, married and has a son. I come across mention of her here and there, as we have mutual friends (well, some of her friends are acquaintances of mine). I do sometimes long for a true reconnect because I just plain miss my friend. But I also know that my wife is against any such friendship and I think that's a good thing. In some ways I'm still not over what happened even though I've spent the last 6 years telling myself that I am. I also had an email sitting in a draft box for a long, long time until just recently. I have come to be content with simply praying for her and her family, all by name, and knowing that God is looking out for them and will let me know anything I need to know.
In fact, just the other day, I was surfing around youtube and somehow found myself staring at a video my ex and her sister (her sister has a rather uncommon name and uses it for her userid on the site) in the "related videos" section of a clip I was watching. I clicked on it to find a video of the two of them doing a rendition of the Beatles' "Help!"...filmed after the fourth round of chemo her sister endured after being diagnosed with Hodgkin's disease in December (Thanks be to God, she's beating the cancer). A couple years back I heard in a rather roundabout and odd way that her father had a heart attack but recovered well. Some may see these as conicidence, but I just like to think of them as God's little nod to me to remind me to continue to pray for them and He'll let me know the fruits of my love, so to speak.
I really don't have any advice other than some things are best left alone. I know if it wasn't for my wife's reticence in me reconnecting with this particular person, I, the weak willed creature that I am, would have done so and probably made things even worse. I'm sure your spiritual elders will have much better advice.