There could be several reasons why you feel like the girl you like has a lot of guys going after her, even though she says she doesn't have many friends:
Perception: Your perception may be influenced by your feelings for her, causing you to notice and remember instances where guys show interest in her more than instances where they don't.
Attention: She might not have many close friends, but she could still receive attention from guys who are interested in her romantically. It's not uncommon for people to have acquaintances or casual friends but only a few close friends.
Online Presence: In the age of social media, a person's online presence can make it seem like they have a larger social circle than they do in real life. If she has many followers or interacts with a lot of people online, it might give the impression that she has a vast network.
Flirtatious Nature: Some people have a naturally flirtatious or friendly demeanor that can be misinterpreted as romantic interest by others, leading to more attention from the opposite gender.
Attractive Qualities: She might possess qualities or characteristics that attract people to her, making it seem like she has many admirers even if they are not close friends.
Confirmation Bias: If you already believe that she is attractive and desirable, you may unconsciously seek out evidence that supports this belief and overlook evidence to the contrary.
It's essential to remember that while she might be getting attention from other guys, it doesn't necessarily mean she is romantically involved with them or interested in pursuing anything beyond friendship. If you're interested in her, the best approach is to be genuine, respectful, and communicative. Get to know her better as a person, and let your feelings develop naturally without making assumptions about her interactions with others. Respect her boundaries and decisions, and allow the relationship to evolve at its own pace.