This only works if she is actually pregnant, and is into you.
You must tell her in your most sincere and heartfelt voice how in love with her you are. You are completely passionate about being with her forever, and want to someday have children with her. You talk about how you look forward to the two of you going to la mas (or however it's spelled) classes together, and being together as you embark upon parenthood. You tell her about the mental picture you've always had of your beautiful wedding, and how you've imagined her in a wedding gown. You tell her how you can't wait to be a dad, and you want it to be with her. Then you tell her how you want all these things, but you want them in a few years (2-3 whatever sounds good), and you want them with her, after you're married. Tell her that if she gets an abortion now, you promise to all that is holy that you will make her forget, that you will spend the rest of your life making it up to her, and giving her beautiful childen after you have a great job and you two are married. You give the best, most sincere, passionate acting performance of your life. Then you take her down and pay for it; gently by the hand and be with her every step of the way (chicks will get cold feet if you do not walk them through it). You continually reassure her how things will work out great, that she'll see what kind of man you are in the long run, that you love her madly.
Then, the day after it is done, you dump her and never speak to her again. Then you go have a beer and promise yourself you will never let this happen again (vasectomy or dbl bag it).
Done and done.
