"you'd better straighten up or you will be looking for someone else to date." i think you better straighten up or else you will be finding someone else to date. i think you better take this relationship seriously or you will be looking for a new date. i need for you to take our relationship seriously because i feel i am doing all the work.

Correct

I need for you to take our relationship seriously because I feel I am doing all the work.

Explanation:

"You'd better straighten up or you will be looking for someone else to date." I think this means if you don't help meet ends and I am the only one putting effort into it, I'll leave you for someone who will make time for me and stuff like that. If they don't take the relationship seriously, meaning if they don't straighten up. Leaving them for someone else, telling them if they don't get there act together about how they feel then they should just go now.

antibodies

explanation:

a progressive heart disease that affects pumping action of the heart muscles.