I Really Love Him.
Shaggy is marrying Mary Jane and it breaks Velma's heart to see him marry someone else
Scene OneThe day before the wedding Velma is sitting there crying and Shaggy comes over to her looking concerned
Shaggy: Velma what's wrong?
Velma (Still crying): Oh Shaggy, it's just that it breaks my heart to see you marry Mary Jane but I could never try to keep you from marrying her as long as your happy because the truth is Shaggy that… I love you
Shaggy: Oh Velma I didn't know you felt that way about me… why didn't you tell me before?
Velma: I didn't realize it until you and Mary Jane became engaged by then it was to late I couldn't destroy your happiness like that. I don't think I'll come tomorrow, I wouldn't be able to keep from crying, and I would ruin your wedding.
Shaggy: But Velma it wouldn't be the same without all four of you there please come… For me
Velma: I guess I could as it's so important to you
Shaggy: Thank you
He kisses her on the cheekVelma (Touching the spot on her face where he kissed her): Why Shaggy! What would Mary Jane say!?
(Shaggy turns red and walks away)
Shaggy (To himself): It won't be easy but I have to do it
Scene TwoIt's the wedding and we got to the I Do's, we see Velma crying and Shaggy glance at her sadly
Preacher: And do you Shaggy take Mary Jane to be your lawful wedded wife?
Shaggy (Looking at Mary Jane's smiling face and then at Velma crying her eyes out): I don't
Everyone gasps, Velma looks up hopefully
Mary Jane: What?
Shaggy: I can't. To do so would break the heart of someone who means a lot to me, she has loved me for years and I realized yesterday I love her too so I can't marry you; Mary Jane I'm sorry.
Mary Jane: I understand Shaggy but tell me one thing, who is this girl that means so much to you?
Shaggy: It's Velma. (Turning to Velma) Velma I love you and I'm sorry I didn't realize it sooner
Velma (Crying tears of joy): It's ok… it's ok
She runs up to Shaggy and kisses him
And eventually Shaggy married Velma instead.