The ornamental design for a loveseat, as shown and described.
FIG. 1 is a front perspective view of a love seat showing my new design with the back and side cushions in alternative positions.
FIG. 2 is a front elevation view thereof;
FIG. 3 is a left side elevation view thereof;
FIG. 4 is a right side elevation view thereof;
FIG. 5 is a rear elevation view thereof; and,
FIG. 6 is a top plan view thereof.
The broken line in FIG. 2 showing of the gap features on the left and right side of the love seat depict the frame brackets of the love seat and form no part thereof.
The objects shown in dotted lines depict environment and form no part of the claimed design.