Many... The positives flip like a coin to reveal negatives too. For example...having a significant other means you share in everything. In many ways, that's awesome! I don't have to be alone and always have someone who cares for me, Wants to be with me, wants to know my thoughts and feelings, to play with, to be serious with, to go crazy with, to seek God with, to experience life with...
...but the flip side is that things mainly hurting only me, now hurt someone else. When I fail, it's not only me that pays for it. If I'm irresponsible with finances, I won't be the only one sick, homeless, or starving... If I cause injury or act foolishly, the person I care about most will be worried, afraid, hurt, angry, sad... Not that we have exclusive rights to ourselves as Christians, but even so...now with someone else... What I do can be a hinderence. If I stay up all night playing games or music...no one cares. With a spouse, it's different... My time is not my own....my actions quickly and directly affect her...
So... though I'm not a worrier by nature, I do worry a bit about that. All of a sudden my addictions, poor life choices, bad habits...are burdens on her. I wonder sometimes if I will find someone in light of such things... Even those looking see things like my being in over a dozen relationships and wonder...they feel some anxiety about me before even really digging much... Idk... Anyway... That's my initial response, I suppose.