Been in a relationship w/a guy I met online for 3 yrs. But why I am still feeling this way again?

I met this guy online 3 yrs. ago. We met twice already, got engaged & planned to get married. But why I am still feeling this way again now? I still confused what he really wants for our future, if he really want to marry me or just wanted to have a gf... Im really hoping to settle down, the reason that I joined an online dating site few yrs.ago till I met this guy. But after all, it's all frustrations. What hurts me most is to know that it seems he can't really decide things for now, Im feeling Im nto his priority. Thinking he got 5 kids in his past relationships, plus being overworked everyday & having all those mortgage problems w/his house, I tried to understand him & be patient after all. But how about me? Im starting to feel scared for having no assurance if when he really wants to get married. Some of my friends had been married even before I met my bf online. It really frustrates me a lot 'coz what I hope is not really what is happening with us. He got a lot of reasons w/c for me are all excuses. I do love him so much but is this right to keep on hope & aspire for something w/c we don't even know if possible to happen? PLs I am very much puzzled now... I want to break up with him & try to move on in my life... But how I gonna tell him? It's always been an issue but never he did something to correct all of these... Is loving someone is enough eventhough we can't expect any assurance at all? My heart was crushed everytime I think about this everyday, all the time... How can I be able to solve this enigma??? Pls help me... God may grant me wisdom to tell me what I will gonna do...

you must choose someone keeping your future in mind,be gentle and speak your mind it will help

Thank you so much Kaamini, really appreciate your words...