Buddhism and relationships

I've started to realize what being a Buddhist really means.
I'm capable of making everyone around me happy, but getting attached, which is the one of the main milestones of achieving a balanced and harmonious life, means not getting attached.

I'm wondering if anyone, practicing Buddhism for more han 10 years can master a relationship and maintain fulfilled happiness with selfless attachment to bloody emotions.

I met the perfect guy in LA, we're absolutely infatuated with each other - unfortunately he is separated and *probably* getting a divorce. I say probably cause it seems highly likely - not based on wishful thinking or ignorance, but from how unhappy he has been with his wife.

This special person said i managed to change his life and I know how much we mean to each other as we speak at least once a day, but at the same time, I try keeping an open mind because a reconciliation might be likely despite it being highly unlikely. The percentage of highly unlikely is still very upsetting for me, because I am used to giving myself to everyone; friends, family, strangers and boyfriends. I don't expect anything back, but i guess at some point I even expect to have my happy ending. I don't get tired of making people happy, nor do I expect anything (or not much) back from people, but at some point seeing people run off after they've taken the best from you, is quite saddening.
I'm not sure to which percentage its about losing faith in the best of people, but maybe, in a subtle selfish way, I might hope that people invest a bit more time in me too. I don't expect gratitude for my actions, though awareness is appreciated.

When it comes to relationships, there's a mutual awareness and unconditional giving that comes with the territory if unconditional love has been achieved at some point. I'm not sure if I'm exhausted of giving and not getting much back or if I haven't learned the lesson well enough.
I know I am content with who I am and I know what I stand for. Even if these traits are not acknowledged, it doesn't make me unhappy as a person, but getting tramped on far too many times does lead to me feeling very, very small and worthless. Giving everything and not asking for anything, leads to a wall of pride if not dealt with carefully. Giving is not supposed to be an investment that will pay back in future.
I hope for that what I do, say and think will lead to better actions, mentally or socially in others. It's not about getting a reward for being a BFF or best girlfriend.

I'm crying a bit too much and have a hard time seeing and have lost the red thread.
I'm going to try visit the Buddhist temple after my move next weekend. Maybe I'll get some plausible answers to make life a bit easier/more comprehensible.

/Jasmin Fischer