I feel like I need to add onto this.
You are never going to have 100% of someone's attention 100% of the time. Even RL partners.
If a person in your life makes you a priority, be thankful and reciprocate if you want, but understand that no one is REQUIRED to give you their time or energy.
People have lives. Their own worlds, their own priorities. We're lucky when our worlds overlap with theirs and have something we can share in. Some worlds overlap more than others. But they never completely merge. And they shouldn't.
We all need things that are just for us. Our own little thing that we don't have to share if we don't want to.
Someone giving attention to others doesn't automatically make you less important. It's human nature to communicate and interact with other people. Some more than others. No one should ever be made to feel wrong or guilty for doing so.
You can't demand or expect 100% of someone's attention. Otherwise you end up becoming that creepy, obsessed friend who can't take a hint. How dare you have friends. How dare you have hobbies they can't get into. This is just as important for real life partners. Do not become that obsessive, controlling, toxic jerk.
So please. Even if it's just internet friends. Reach out. Find other people to spend time with.
And this comes from someone with massive social anxiety.