I (30F) don’t usually enjoy sex with my boyfriend (35M), worried things won’t improve

So for context, this is my first relationship and also first sexual partner. We’ve been dating and having sex now for almost 2 years. We’ve don’t live together but see each other at least once a week.

I am almost certain that I’m not able to (or at least find it very difficult to) cum with penetration alone. If using a vibrator/suction toy on my clit, I am able to very quickly. We have experimented trying both at the same time but not really found a toy (although not tried too many) that feels comfortable and not bulky as well as actually stays on during penetration. If anyone has any recs that fit this, please do let me know.

Anyway, I’m just worried because the only real way I can cum with him is if a toy is involved. Even when he gives me oral which he is always really enthusiastic about, it just doesn’t feel that great. I’m just not really sure what this is all down to and unfortunately I don’t have the sexual history to be able to compare.

It’s also making me overthink if I’m sexually attracted to him enough. I do find him attractive but he has gained a bit of weight since we first met (not crazy amounts but a bit to be noticeable) and at the same time I’ve also lost some weight and working more on my health so maybe making me notice things more. Although, he has recently started trying to make some changes.

Tbh I’m just not sure if it’s my sexual compatibility with him, ?do I have low libido, inability to enjoy penetration in general, or something else. So just looking for some advice if anyone else has gone through something similar or just has any tips for me.