i just don't know.

So I've been with my boyfriend for almost a year and a half. It's not a long time but it's something and I've been feeling pretty weird lately. I love and care about him but I'm not feeling really connected in our relationship. I'm not feeling like I was before. I'm not sure if maybe it's because I've been in kinda a depressed mood these past couple months or if we're just growing apart..
This is a long distance relationship, however that hasn't really been a problem for us. We've been making it work and constantly visiting. 
But like I said, lately I just haven't been feeling too much of anything regarding our relationship. I'm young, I'm almost 20 (he's going to be 23 btw) and my boyfriend and I both agreed that in our relationship we are going to think long term and such. But i don't know. I'm also thinking like I can be dating other people because I'm still so young. Someone might think I'm cute and want to date me 😂  And part of me just doesn't know if this is the man God has called me to be with. I've been trying to pray about it but I'm just a mess. I needed to vent about this. It's been bothering me for a bit. Please drop some advice if you have any or just simply carry on. I just needed to get this off my chest. Lol