If you assume that the pattern around the table is the only thing of importance ( ie that seats are not numbered ) then seat Girl 1 anywhere.

Girl 2 has 2 choices of adjacent seats and we have the Permutation any three from 4 remaining seats

so 2* 4P3 = 2*24 = 48

remember this assumes that a pattern GG_BBB where GG are in seats 1 and 2 is identical to the pattern GG_BBB where GG are in seats 3 and 4 ,but not identical to GGB_BB ( GG in seats 1 and 2)