The two most important people in your life are usually your man and your best friend. You obviously value the relationships you have with your partner and your friends and need to keep them happy to keep them.
You do that by treating them as individual relationships. Whatever your relationship is like with your spouse, where you probably have ups and downs, good times and bad, you keep that separate from your friends. Of course you might sometimes tell your very close friends about how things are, especially if you have had an argument or disagreement and just want to let off steam, but you do not try to get them to solve your problem for you or get involved. The time you spend with your friends is to work on the relationships you have with them. Likewise when you are with your spouse concentrate on your spouse, do not keep on about how one of your friends annoyed you today when she did such and such, or you are looking forward to seeing her tomorrow when you go shopping. By all means mention these things but do not milk the subjects.
Sometimes your man might be jealous of a friend, especially if you spend a lot of time with them. Maybe you both work at the same place. It would also follow that he might be jealous if you have known your friend for a very long time, longer than you have known him, or he knows you talk to your friend about things which you do not divulge to others. He may be concerned that you talk to your friend about your relationship with him. Whether you do or not is, of course, your choice, but it would be a good idea to explain to your spouse that he is the most important person in your life and he is the first person you come to with your news and worries. If he can feel that he is now your very best friend he will not be resentful of other friends you have. You can prove to your man that you put him first not just by the way you talk but by actions. Make him feel like he is the one you prioritise with your time. A good way to do this is to arrange to see your friends when he is at work or busy with his family, friends and hobbies. That leaves more time to spend with him.
The relationship you have with your man should be totally different to the relationship you have with your friends. You should be loving, passionate and romantic with him, whereas you see your friends to chat, laugh and chew the cud. If you find that since your relationship with your man evolved you have less time now to spend with friends this is natural and you can always explain to your friends that you wish you could see them more but cannot because of other commitments. True friends would understand and accept this.
If a friend comes to you with a problem and asks for help and wants to move into your home or borrow money this is when you must be very cautious. Do not instantly say yes that is fine. You have an obligation to yourself to do what is best for you. You also have an obligation to your man to do what is best for him. If your relationship with your man is a new one you will be wanting a lot of private time together without gooseberries floating around the place. And, anyway, maybe your home is too small or it is not pratical for some other reason. Never let your heart rule your head in such circumstances. Always discuss things with your friend finding out what they need and what you can comfortably do to help, then discuss it with your man and only do what he agrees to. It would be silly to risk hurting your man or having a problem with him because of a thoughtless or selfish friend.
Do not forget that friends can come and go, even the ones you have known for a long time. It may be that your friend will fall in love and move in with someone and have less time for you. Or have children and be too busy with them. Whereas your relationship with your man gives you more and is supposed to last forever. So that should be the relationship you put first. A true friend would not expect anything else of you. She would want you to do what is best for you too.