My H said the same the last night. It's super painful to hear that the one you love isn't missing you like you are missing them. It hurt me at first but then I realized he hasn't been happy for a while and to him anything is better than the kind of marriage we had. I'm trying to learn not to take things personally.
Try joining a meetup group or something like that to meet new people. I know it's super hard and I struggle with it daily. But in the end the worse thing that will happen is you will divorce and even that's not the end of the world. You are young and have much living to do. Good luck.
M12 Kids 2 ILYBINILWY 08/05 Reconciled 05/06 S07/12 Moved back 03/13 Separated Again 06/24/13 Back Again (his choice) 02/14 Leaving again 03/23/14 DIVORCED 02/15