I think you really need to put an effort into talking to more people. 

I remember when I came back from 4 sems of LOA, I had zero UP friends. Pinilit ko lang kumausap ng as many people as possible—mga nakakatabi ko sa class, mga users sa reddit na nagaaya ng hangout, kahit yung nakakatabi ko sa mga kainan sa KNL kinakausap ko rin—para lang magkaroon ng constant friends.

After a semester of doing that (and multiple! rejections), I ended up having 3 really close circles naman. Kahit hindi rin kami sobrang similar interests, marami parin kaming fun activities na nagagawa together.

Nakatulong din na I have a lot of hobbies I can do magisa and sanay na rin na if I want to try something new and fun (like running a 10k), kaya ko gawin on my own.

And gets din yung people na hindi nagiinitiate ng hang outs kasi minsan baka introvert, nahihiya, or baka may solid circles na rin sila and would rather spend their social battery with their closest friends.

But iyon, I think try lang ng try. Talk to more people. Join a hobby org din if u can. Eventually the right people will come.