Those who have been in love several times and are in love now - how do you feel about your past loves?

Chi
Do you look back on your past loves as a learning experience? (regret or no regrets?) Also with each new person/current person you're in love with you do you look back and think the others actually meant less to you than you thought or will a part of you always love them?
​I know it's all relative depending on how those past relationships ended but I wanted to hear your own stories about this situation if you've come across it!
​My story is that I'm truly and deeply in love and he's the first person I've felt this sort of love for. We've been together for just under 2 years (I'm 22) but about half of that has been long distance because of circumstances. We recently had a Serious Chat about The Future and unfortunately realised that there's no way for us to be together in the same city anytime soon. Neither of us wants the other to compromise their current life plans for the other especially  whilst we're still at this young stage in our lives. So we both decided its for the best to end it now rather than leave our love and friendship to disintegrate later... It's been an extremely difficult decision but at least we still love and respect each other and we'll still be in touch as friends. 
​So I can't really answer my own question but I've been thinking about what it would be like if I were to fall in love with someone else. I know it's different for everyone but please enlighten me with your stories!