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You’re not going to like everyone you meet, and vice versa. Like dating, building a solid network of friends can be a numbers game. Try to focus on the long-term goal of making quality connections, rather than getting caught up in the friendships that didn’t pan out.
Keep rejection in perspective. It never feels good, but it’s rarely as bad as you imagine it will be. It’s unlikely that others are sitting around talking about it. There’s no big “R” for reject on your forehead branding you for life. Instead of beating yourself up, give yourself credit for trying and see what you can learn from the experience.