Making friends in second semester

I’m in my second semester and for the most part things are going well. I’m doing well academically, my roommate is tolerable and I’m getting involved, and yet I still feel lonely. I’m in a sorority and I know plenty of people, my big and I are close and I really love it. The problem is, I’ve never really had to make friends before. I went to high school with two girls I’ve known forever, and their friends were my friends so I’ve just always had friends until now. I think I’m good at meeting new people and making good impressions, because everyone I talk to is really friendly. The problem is that I don’t know how to get past that point. Specifically in getting people’s phone numbers. I have one girl that I’m good friends with and so whenever I’m going to lunch or dinner or I’m bored or anything I text her, but I can tell she’s getting annoyed with me because she’s the only person I ever ask. I know lots of other girls that I would feel comfortable texting if only I had their phone number!! I feel kind of left out because it seems like everyone else has each other’s phone numbers and are in group messages, etc without me. I’m sure it has nothing to do with me but I just don’t understand how I didn’t get people’s numbers when I was at all the same activities and being social as they were.

Step 1: see friends
Step 2: say, “Oh, we should get lunch/dinner together sometime! What’s your number?”

Really, it’s that simple. Just ask. If you’re not weird about it, other people won’t be.