Social skills while in university, and P-induced social anxiety

Hi all,

I am a university student who will graduate within the next two years. One year ago, I stopped going on some "sites", and got a relationship fairly quickly after (with someone I've known since high school). Nowadays, it's excessive M that I'm battling, as well as intrusive P thoughts during the day (some images are still there in my head, even though I stopped such a long time ago).

A few questions about social skills:

• How do I start conversations with other people who are on their smartphones all day? Do I just ignore those people, even if they're sitting next to me? I feel as though more and more people these days are isolating themselves on their smartphones, and I'm not sure what to do about that, since I don't have an extensive real-life social network.
  
• There are times when I notice the person next to me is not on a smartphone, but I get nervous about starting a conversation because they're a girl...

In fact, I've had trouble talking to girls ever since elementary school, and I've literally been accused of being gay over it, when it was just excessive P distorting my thoughts, back then.
Nowadays, I'm still here with barely any "small talk" skills. When it comes to girls, the anxiety kicks in, and I'm scared of being called a creep and just "looking for a sexual relationship". In fact, I'm already in such a relationship, so I have even less incentive to start a conversation with other girls due to this fear.

I recognize how silly it is, but I guess that due to P, I've never really understood the concept of having a "platonic female friend", and so never really had any close ones that I can open up to (except one, formerly, but now it's beyond "friend"). Either way, I feel as though it would really help for me to expand my network to be diverse in terms of gender, too.

Any help here would be appreciated -- thanks in advance. I'm already on a few days no-M streak after lurking for a while on these forums, and I'm wondering if there's anything more I can do.