How do I know we're compatible?

I just don't want it to be this thing where sex and the strong feelings of love and care, cloud our judgement.

We're so different from eachother, it feels like we're opposites. And idk I've felt it before in my previous relationships, where i feel this strong feeling of love and admiration towards them, but when we have a conversation i realize i feel so alone.

Should we get to know eachother mentally? Go out on a date?

What are some questions o should ask to get to know them well?

We have a lot of chemistry but is it enough to make it work?

Honestly part of me does feel a little afraid of not working out with him because it's back to being alone. And i can be alone but it can feel so lonely sometimes.

Any advice?