Can I keep living with my partner after becoming Muslim?

Not usually, if you share a home as an unmarried couple. Islam doesn't allow a sexual or romantic partnership outside marriage, so that arrangement has to change. The usual options are to marry (if the marriage is lawful), to live apart, or, if you truly can't move right away, to end all intimacy at once and arrange separate living as soon as possible with an imam's advice.

Why the arrangement must change

Living together as a couple involves intimacy and privacy that Islam keeps for marriage. The Quran says, "Do not go near adultery" (Quran 17:32), and the Prophet ﷺ warned that when a man and woman are alone together, the third of them is Satan (Jami at-Tirmidhi 2165). Becoming Muslim means adopting these limits from now on.

The good news is that the past is forgiven. The Quran says that if disbelievers stop, their past will be forgiven:

قُل لِّلَّذِينَ كَفَرُوٓا۟ إِن يَنتَهُوا۟ يُغْفَرْ لَهُم مَّا قَدْ سَلَفَ "Tell the disbelievers that if they desist, their past will be forgiven." Quran 8:38

You are not asked to relive or punish yourself for what came before your shahada, only to change course now.

Your options

Marry: possible if your partner is Muslim or becomes Muslim sincerely, or if you are a Muslim man and your partner is a chaste Christian or Jewish woman. A nikah with a wali and witnesses makes the relationship lawful.
Live apart: one of you moves out. This is the clearest solution, and it is the one most imams give.
A short transition: if there is a lease, no money for a new place, or children involved, some imams allow a temporary period in which you stop all intimacy and sleep in separate rooms while you arrange a move. This is a stopgap to discuss with your imam, not a permanent arrangement.

Don't convert or marry just to solve the housing problem; the nikah has to be sincere. See Can I become Muslim just to marry someone?

Practical steps

Look at your lease and notice period, ask a family member or a friend if you can stay with them, and speak with your mosque community, which often helps new Muslims with short-term housing or advice. Allah doesn't require of a soul more than it can afford (Quran 2:286), and He loves ease for you in hardship. Don't delay the essential step of ending intimacy while you sort out the logistics.

If you have children together

Your responsibilities to your children continue whatever happens to the relationship. Agree on contact, care and finances calmly, and keep the children out of conflicts. If your partner isn't Muslim, you can still raise the children with Islamic values. See How do I raise Muslim kids with a non-Muslim co-parent?

Talking to your partner

This is a very emotional conversation. Be kind, honest and clear. See How do I tell my partner I became Muslim? and Can I still have a boyfriend or girlfriend after becoming Muslim?

Key points

Living together as an unmarried couple has to end after you become Muslim.
Your past is forgiven; what matters is a clear change now.
The main options are a lawful marriage or living apart.
If you can't move immediately, stop all intimacy and ask an imam for guidance.

Tip: Contact a local imam or convert support group this week, before the situation gets harder. They can help with both the religious ruling and practical things like temporary housing.