'Bulking' is a myth. In today's world of broscience you have 2 common types of people giving the same advice:
1 - People on steroids, passing their gains off as natural
2 - People that listen to the people on steroids, think they're natural and pass off their 2nd hand advice as their own
All calories are not equal. If you eat a surplus of fatty foods, processed foods and supplements you will put on fat and become unhealthy.
You do not need to put on any fat to bulk up, just do not eat more calories than you burn off. If you eat less calories you will lose weight, if you eat the right amount you'll build muscle and if you eat too many you'll put on fat.
Eat clean and do not set your expectations based on all these people on steroids - celebrities, YouTubers etc. Just be healthy and happy with who you are.