I (22F) don't understand my bf (21M)

2 weeks after I broke up from a toxic relationship I started dating my new bf. We have been dating for 7 months on and off now. It's online long distance relationship and we have never met in person.

We both aren't experienced much and we both struggle with depression (he also has ADHD).

When he told me he found me sexy, I labelled him as pervert and told him men doesn't view the woman they love like this. He admitted that when he looks at me he gets hard (even though I am just wearing normal pyjamas, nothing sexy. But he says it's not related to what I am wearing and he is attracted to me).

After a long fight and breakup he reached out on new years night and wanted to try again with me. Soon after we started dating again I started antidepressants and stopped starting fights with him.

We both had final exams and he didn't text me unless I texted him. His answers were all short and he didn't ask me how I was (even though he knew I went through some hard time). He called me one time in three weeks because I requested. When I wanted to talk about our relationship he said it's not the right time for this and he fell asleep soon after. He told me he would call me next week.

The next week I asked him again when we could talk and he called me directly from outside. We talked until his friends came next to him.

None of his friends know he is dating me. He says this is his privacy and nobody needs to know this.

He called me the same night and we talked a few hours and chose what he will be wearing for the vacation he is going with his family.

When he was on vacation he only texted once a day and it was "good morning". When I told him he was texting someone else he got angry (1 hour before he texted me he was online, I am his gf I should be his priority. And usually you send gm message soon after you wake up.).

The next 2 days he didn't contact me at all. After I shared a story with a friend of mine on social media he sent me a good morning message again. But he isn't trying to make the conversation go longer. Even though he returned home from vacation he doesn't call me or text me.

When I ask him he says "We are dating, and i love you. I see you as my gf. But I think you are sometimes overreacting. I have ADHD and it's normal for me to forget texting you."

I trust him, and i don't think he is cheating on me. He knows my ex cheated on me and I am very sensitive about this.

Everytime we breakup he comes back to me and says he doesn't know why he can't stay away from me. He says he doesn't find any other girl sexy like me and he isn't interested in p***. He also doesn't want me to watch it because he is afraid of me being attracted to someone else sexually and leave him. He isn't a jealous person, and he says he doesn't stalk my social media accounts.

He also said once he doesn't need to show me attention like the other boys because I am his gf.

I am worried he isn't aware of his feelings and what he feels isn't actually love and it is lust. I don't know how to communicate this with him since he isn't good at communicating.

TL;DR: My (22F) bf (21M) is behaving very distant and I don't know how to tell him I am not happy in our relationship. I still love him and I can't understand his behaviours.