No. I suppose I feel a got over a very bad situation before and became happy totally without treatment... Praying it'll happen again
What were you doing when the depression lifted? Looking back, are there any hobbies, habits or routines that might have helped? Vitamins? Anything hormonal like going on or coming off contraception (I believe hormones are the key to almost everything to do with our mood!)?
There's an expression I've always liked: "Those that have little, love much; those that have much, love little." I interpret it as saying that romantic relationships become our main focus when the rest of our life isn't fulfilling us. So when we're down, or a little lonely, we're more likely to become consumed with the object of our affection, far more than when the rest of our life is busy and satisfying.
I'm not trying to talk you out of your interest in this man! But focussing on the rest of your life while you get back to happiness will almost certainly help. Please don't torture yourself over regret or missed opportunity, please don't. I've been there and it's SUCH a rabbit hole of sadness!
What do you like to do? Even the tiniest thing? (Mine would be miniscule when I'm really low; like feeding the birds in the garden, drinking real coffee, watching "This Is Us" on Amazon Prime - OMG, it's so good - or re-reading my favourite books...) Start pulling your regretful thoughts away and focus your attention on somethin small and lovely, until you slowly surface, into the sunlight.