Quote 1
BEATRICE
Just, if He send me no husband, for the
which blessing I am at Him upon my knees every
morning and evening. Lord, I could not endure a
husband with a beard on his face. I had rather lie in
the woolen!
LEONATO
You may light on a husband that hath no
beard.
BEATRICE
What should I do with him? Dress him in my
apparel and make him my waiting gentlewoman?
He that hath a beard is more than a youth, and he
that hath no beard is less than a man; and he that is
more than a youth is not for me, and he that is less
than a man, I am not for him. (2.1.27-39)
Beatrice denounces marriage in general, but you’ll note that she goes on to point out the particular flaws of particular men. We’re left to guess whether she is against the institution of marriage in principle, or whether she’s simply convinced she’ll never find the right man. (Or is her man-bashing a consolation prize because she hasn’t found anyone yet?) Lots of possibilities, but the point is, she’s not stoked about marriage.
Quote 2
BEATRICE
Good Lord for alliance! Thus goes everyone
to the world but I, and I am sunburnt. I may sit in a
corner and cry 'Heigh-ho for a husband!' (2.1.311-313)
Beatrice jokes that she is unattractive and will never get a husband. (As though this were the sole reason she is still unmarried.) It’s also interesting to note that her "Good Lord, for alliance!" mirrors Benedick’s concern that he’ll never see another old bachelor—both of them seem to be sensitive to the fact that everyone is getting married, except for them.
Quote 3
BEATRICE
'Tis almost five o'clock, cousin. 'Tis time
you were ready. By my troth, I am exceeding ill.
Heigh-ho! (3.4.50-52)
Remember that the earlier Beatrice said she’d cry "heigh-ho," to find a husband. As Hero is off to her wedding, Beatrice likely itching for Benedick to be her own husband. Beatrice’s suddenly becoming ill mirrors her cousin’s sickness, but Beatrice seems to be sick for want of a husband, while Hero is about to be unwanted by a would-be husband.