My boyfriend [26M] follows various random girls—should I see this as a red flag?

I'm a 24-year-old woman in a long-term relationship with my boyfriend, who is 26. Recently, I've noticed that he occasionally follows 1-2 random girls on social media. It's not a frequent occurrence, but it happens at certain intervals. I get the sense that these connections aren't just casual acquaintances from work or social circles, especially since some of these girls don't even follow him back. Initially, I thought he was just trying to build his social media presence since most of these girls are quite distant from him. However, he recently started following people from his local area, which has made me feel even more anxious since he lives in another country. Whenever this happens, I can't help but feel a deep sense of disappointment, and it makes me question the significance of my emotional investment in our relationship. The girls he follows seem to share a common trait of having a follow/follow back rate of about 1:2, which gives off a vibe of seeking attention. I'm hesitant to bring this up directly with him because I worry he might view me as overly obsessive or paranoid. Plus, I fear that if I mention it, he'll become more secretive about things in the future. I also wonder how effective it would be to ask him to stop this behavior—after all, this feels more like a deeper issue rather than something that can be easily fixed. To me, it seems to reflect on his character. On a positive note, he is generally supportive and open about his future goals with me. However, I can't just ignore my feelings; my anxiety is noticeable, and he seems to sense that something is off, which only adds to the tension between us. I'm left wondering if this issue is significant enough to reconsider the relationship. I would sincerely appreciate any advice or insights on this situation!