Married 1.5 years and struggling with intimacy - need advice, please dua

Assalamu alaikum. I married about one and a half years ago in an arranged marriage, but we’ve basically been in a sexless marriage because my husband has erectile dysfunction. I did lose my virginity to him, but whenever we try to have intercourse he loses his erection very quickly - it’s weak and doesn’t last. Outside of this, he’s loving, romantic, and provides for me in every way, so I don’t want to throw that away lightly. I’ve asked him to see a doctor, but bringing it up is really hard. He shuts down, says he will go, we argue, then make up, and nothing ever happens. I haven’t told my family because I care about him and don’t want them to form ideas that might harm our marriage. I want to save the marriage but I don’t know how. At first I had a high libido, but now I don’t get excited. My mind keeps racing - I worry he might be gay or that he knew about this and hid it before marriage. I’m afraid resentment is building. Sometimes his cuddles feel like he wants comfort more than a sexual connection, and I’m losing attraction. I know Islam allows divorce, and I’ve thought about it and even asked him if he thinks the marriage can survive; he says yes, but I don’t see him taking steps to help himself. I also worry if I leave, will I find someone else with his good qualities. I feel depressed and angry at times and I keep asking Allah for guidance and help. If anyone has sincere advice - especially Islamic, practical, or medical approaches on how to encourage him to seek help, how to work on intimacy together, or how to cope emotionally while preserving the marriage - please share. Jazakum Allah khair.