I don't think Bulgarians have profiles like this but however of all other south slavs you would be closest to them.
Target: MarijaK_scaled
Distance: 2.6500% / 0.02649991
66.2 Old_Balkan
10.6 East_Med
10.4 Old_Slavs
8.0 Volga_Basin
4.8 Early_Germanic
Target: Macedonian_Jegunovce_scaled
Distance: 2.5330% / 0.02532968
70.8 Old_Balkan
22.0 Old_Slavs
7.2 Keltic_Central_Euro
Target: K_scaled
Distance: 3.1194% / 0.03119361
60.8 Old_Balkan
19.4 Old_Slavs
8.8 Volga_Basin
7.2 East_Med
3.8 Early_Germanic