Relationships

Why boyfriend talks about sexual (usually and only) things with me?

I'm in online relationship with my boyfriend and he just talks usually about sexual things with me. We have been in kinda on and off relationship for three years now.
We only met recently just twice.

And I moved from my city to another for him, so we can meet more, recently.

But usually he just talks about sex or things like it, never we have any usual talks like, the things we like in general, like our inclinations, or like, how we are good for each other and if we can be together always.

When we first met we have make out, and the other while too, but a bit only.

Today when I asked if we can meet, he said he wants to have sex. I got bit sad and said if am only for this, because am remembered by him for it only, we just usually do n**e VC, will always force me for it, then once we are done doing it, we usually talk just a little about any other things then.

And he then said, he wants to break up because I don't trust.

I want to know if we are truly in love.
I am scared if am even been in love.
I love him a lot please guide me.
I don't know why but he even Snapchat with girls, and said are just friends, recently.

Was I just a stupid thinking we are in love?
Am I not correct in thinking we need to understand and know each other more?
Why boyfriend talks about sexual (usually and only) things with me?
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